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Posted by: Doohickie Nov 11 2006, 02:13 AM

I noticed I was up to 300 miles on a tank of gas, and still had over a quarter tank. So I started really taking it easy to see if I could get a 400 mile tank. Today the low fuel light came on just shy of 370 miles and I lost my nerve and filled up. It only took 12.6 gallons and on calculating I found I got 29.7 mpg! So even though I lost my nerve, I could have easily made 400 miles on the 14.5 gallon tank.



I've gotten 400 on a tank once or twice before, but only on long trips. In my normal commute I generally fill up around 300-320 because it's getting low and I don't generally push it to empty. I've averaged 26.5 mpg since buying the car, and usually that's what I get on my commute more or less.

But if I start getting 30 mpg on a regular basis, I'm not gonna complain!

Posted by: popeye Nov 11 2006, 02:21 AM

That sounds about what I'm getting. I go between 325-370 a tank with a gallon or so to spare, unfortunately the trip computer is weighted (averaged) I think, so while you think you might be getting some figure before fill up, it's a bit less and always scotches your best efforts at that coveted 400 mile tank... .

I think 375 was the highest I got before the miles started to flash - - - -

Posted by: Silent Wolf Nov 11 2006, 02:24 AM

Um Dooh and I have GLS models, no trip computer. Unless u installed something Dooh?

Posted by: RHINESEL Nov 11 2006, 02:40 AM

Unfortunatly, highway driving is where are cars really shine milage wise. I average 32 mpg with a SULEV engine automatic. I do about a 70/30 split, mostly highway.

When I or my wife takes the car to run errands though it seems like you can watch the gas needle drop.

Posted by: rtj525 Nov 11 2006, 05:24 AM

Good Day,

I am the owner of a 2003 ELANTRA GT Hatchback with manual transmission, ABS, Traction Control and almost 71,000 miles. I have a 34 miles one way commute to work, most of which is on I-380 and open roads. I watch my driving, so as to maximize mpg, and I am consistently rewarded with 33 - 35 mpg. As for miles/tank, I am always well into the mid 500 mile range.

I have found that the mpg dash computer and my computing mpg the old fashion way always is within a few tenths of each other.

Previous to my buying the ELANTRA, I had been the happy owner of two Honda Civics and an Acura Integra for about 15 years. My purchase of the ELANTRA was strictly economics. Although I wanted a new CIVIC, at the time, the few thousand $$ more was a bit too much. My ELANTRA has been trouble free. Oil is changed every 5K, and maintenance is performed as per Hyundai recommendations.

I am presently lusting after the new ACCENT SE 5 speed, but with only 71 K on my ELANTRA, I will just have to wait.

Robert

Posted by: Levonida0103 Nov 11 2006, 06:29 AM

my 06 elantra which i purchased jus last november get at most 615kms, using premium fuel members here say that it makes no sense , but i see a difference with regular i get about 505-525 most and that's shifting at 2000-2500 rpm's

Posted by: CsrLiz344 Nov 11 2006, 09:51 AM

I just got back from NY Thursday night, and on the way out, I got 40.2 mpg. On the way back, coming a totally different way, over the mountains, and with a few hundred extra pounds in the trunk from shopping in NYC and such, it dropped down to 33.8
Not too shabby.

Posted by: popeye Nov 11 2006, 10:35 AM

I'm beginning to think my car is somewhat of a lemon, I rarely get beyond 30mpg and I'm not talking what the trip computer says because that thing is a damned liar. I fill up at the same station always in the mornings and record my mileage.

I think I averaged 30-32 on my trip to Yosemite, but my normal average is 26-29 mostly highway like Rhinesel.

Another thing, my wife's GLS is a much peppier car than mine and begs to be be driven fast, whereas mine feels like an old person at times and to get up an move, I need to push it to do so.

Posted by: Ishtar Nov 11 2006, 11:34 AM

I average about 24 mpg. Because I do all city short hops. Back when I did get highway driving in, I got 28-30mpg.

Posted by: blupupher Nov 11 2006, 02:10 PM

Filled up the other day, Distance to empty showed 472.
I have driven from OK City to my house in Katy in one tank (478 miles) with 2 gallons left in the tank. I usualy get aaround 400 per tank with my work commute.

Don't need a computer to figure it out...

Posted by: scraitt Nov 11 2006, 04:22 PM

I drive 38 miles each way to school, four days a week.
85% is highway driving.

I average 37-38 MPG. I've actually gotten it up to 41MPG a couple of times.

Also, I live in south Florida, so theres virtually no elevation changes on my drives.

Posted by: elantragt Nov 11 2006, 10:26 PM

Did you coast the entire way? That's actually waaaay beyond "not too shabby".

Posted by: thunderabeGLS Nov 12 2006, 01:35 AM

i put 12.24 gallons today and noticed that i had driven 317 when i went to reset it.
seemed higher than normal with so much gas still in the car when i chose to fill-up.

Posted by: FadeToBlack Nov 12 2006, 02:30 AM

I don't usually let any of my cars drop below half, so I'm not sure what my mileage is on a full tank. I keep a watch on the fuel economy meter thing, though, and I've never seen it drop below 27 mpg in mostly "city" driving. (live in a very small town, definitely not a city..hah)

Posted by: elantragt Nov 12 2006, 08:33 AM

I generally get about 22 mpg doing typical city stop and go and about 34 mpg with all highway driving. Recently my mix has become a little more stop and go and I'm only averaging about 26-27 mpg overall.

Posted by: cclngthr Nov 12 2006, 10:06 AM

I averaged 22 city with the XD, but my HD averages 26. The HD is still factory though.

Posted by: Bitterman Nov 12 2006, 10:28 AM

I usually get about 29-30 mpg during normal driving to work and my girlfriends house. That's a mix of some highway, local, and city streets. Pure highway driving I'll get around 35-36 mpg.

Posted by: Bobzilla Nov 12 2006, 10:57 AM

WEll, the winter-mix gas is here. Wife drove the car all last week and her normal average of 33ish dropped to 30.9.

Posted by: CsrLiz344 Nov 12 2006, 04:28 PM

Actually, I set the cruise on 70, and didn't slow down much at all.

Posted by: elantragt Nov 12 2006, 05:13 PM

Liz...40.2mpg is amazing. Best I've ever done on a long pure highway trip is maybe 37.

Posted by: Goldenguy Nov 12 2006, 06:42 PM

My highway best (read: Arizona to Indiana) was about 36MPG in the Elantra.

I did make half a tank though on 260 miles, and being that a usual half tank fill-up took about 6 gallons in the Elantra, that's right around 43MPG. The actual fill-up was only 5.2 gallons, but the needle was barely at full, so I assume it cut the filling early.

So far with the Tiburon, I have about 240 miles on 3/4 of a tank of gas. Pretty much right where the Elantra was getting me. However, that's on factory setup. As of tonight, I converted the factory intake to cold air, so maybe see some improvements soon.

Posted by: neverfinished Nov 13 2006, 09:22 PM

i range anywhere from 23-28mpg most of the time, but if i'm trying to save money and take it easy i can get about 30-33, and i made it all the way to 37 on an all highway road trip, my cruise was set about 70-80 depending on how many cars where around

Posted by: Goldenguy Nov 13 2006, 11:07 PM

First fill-up in the Tibby turned 11.9 gallons on 264.2 miles. My driving is all city driving and 22.2MPG meets the sticker mileage. Not too bad for factory performance settings and first tank. I'm presuming it will increase as the engine breaks in more and as I have the vehicle modified for more efficiency (most of which is actually done now).

Posted by: tmant Nov 16 2006, 12:15 PM

My wife has been driving the GT lately in mostly short trips (1-5 miles) and have been getting around 20-22 mpg for the past few months. We should be making a trip this Thanksgiving and hopefully the 30+ mpg will make me few better.

Posted by: Doohickie Nov 16 2006, 05:01 PM

I'll be driving down to Houston tomorrow; we'll see how the Red Rocket does on the highway.

Posted by: Goldenguy Nov 16 2006, 09:28 PM

On the latest fill-up, I have 100 miles and juuuuuust below the 3/4 mark. Already a 20 mile improvement from the last fill-up.

Posted by: cclngthr Nov 18 2006, 12:24 AM

I went to Olympia from Tacoma, which is a 26 mile freeway trip and my average speed was 70 and I averaged 40 mpg on my HD. I bet I could get higher mpg if I was easy on the gas pedal.

Posted by: Doohickie Nov 20 2006, 01:05 PM

Driving down to Houston I drove 75-80 most of the way, then drove around Houston on the same tank of gas. I got 29; not as good as I was hoping, but decent considering Houston traffic (nuckin futs!)

I filled up just prior to leaving and filled up again this morning. A little better: 34 mpg. I was hoping to get better than my previous best of 35, but we ran into some heavy traffic on I45 in Houston after filling up- stop and go for a bout a half hour.

Posted by: Bobzilla Nov 20 2006, 01:10 PM

Any length of stop-n-go kills the mileage average. If we could just get them to build better flowing roads our fuel consumption as a whole would go down drastically.

Posted by: southpawboston Nov 20 2006, 01:38 PM

the roads we consider congested *were* better flowing when they were made. sad fact is, the number of cars on the roads has increased *dramatically* in the last 40 years, whereas new road construction has been minimal (except maybe in california). when the federal highway system was in place, mostly by the late 70s, things were a lot better. now you can expect traffic jams anywhere and anytime.

Posted by: Bobzilla Nov 20 2006, 01:44 PM

Which is what I just said. . . the government is about 40 years behind on keeping up with the roads.

Posted by: wills03 Nov 20 2006, 02:36 PM

I average about 26 mpg but, the last time I calculated it I got 28.5 mpg and went about 350 miles on a tank. That's just about as good as when I drive the 1500 miles to go home.

Posted by: RHINESEL Nov 22 2006, 12:50 AM

Like our "Big Dig" relieved congestion on 93 South, right? I laugh every morning when I hear about the backup. 3 lanes to 2 lanes to 4 lanes = Still a problem!

Posted by: tmant Dec 4 2006, 01:57 PM

Trip down to San Antonio definately gave me 30+ mpg. I monkeyed with the computer too much on the way there so I don't have a good number to say. The trip back averaged 36mpg from fillup all the way home.

I haven't calculated mpg from the fillup amounts, as I did not fill up when I got back. It was down to 31 mpg by the time I did fill up after a few days.

I was getting high 37s the first 60 or so miles in/leaving San Antonio. Dipping under 36 on most of the hilly highway. And then creeping back up into the low 36s in Houston.

Posted by: wills03 Dec 15 2006, 09:31 AM

I'm happy. I just got 29 mpg. That's the best I have had in almost a year. It has been down around 25-26 mpg but, I just tried to drive easier and it saved me a lot of gas.

Posted by: Goldenguy Dec 15 2006, 10:26 AM

Last fill-up netted 21.14MPG, and the lifetime car average so far is 21.93.

For all the city driving I do (pretty much all trips are under 10 miles, most under 5 miles in fact), I can't say I'm displeased. Sticker on city is 22.. and I'm by far the poster-child for city driving.

Posted by: winc Dec 15 2006, 10:41 AM

I average 33-34 mpg, 10% city/90% hwy driving 55-60 mph but stop & go backroads. On trips I get worse, about 31 but notice mpg drops when cruising above 60. One exception: driving 70-85 semi-aggressively through Raleigh on the freeway always brings up the mpg (on a avg reset - computer shows 40-45 mpg avg... must be due to the windflow of 3-5 lanes of traffic all going the same direction at higher speeds)

Posted by: silet Dec 15 2006, 10:54 AM

The last few fillups have been consistent at 8.5 gal per 300 miles... about 35 mpg...

Posted by: wills03 Dec 15 2006, 11:13 AM

How do you get that silet?

Posted by: silet Dec 15 2006, 12:10 PM

I drive 150 miles a day, CC at 60-63 mph, 98% highway and now snows 190/60/15. I was around 9 gal for the same distance with the 225/50/15 summer BFGs.

Posted by: southpawboston Dec 15 2006, 12:30 PM

i consistently got 33-36 on long freeway trips, with speeds averaging 65-75. not too shabby. but in boston "stop and stop some more" traffic, it plummeted to about 22.

with my 2.3L mazda3, i'm seeing about 30-31 on long freeway trips (definitely not as good as the elantra's, but i also have 18hp/20lb-ft more, so who's complaining ). and i'm getting about 21 in boston stop and stop traffic... roughly the same as the elantra.

Posted by: RHINESEL Dec 15 2006, 03:29 PM

Now that winter is upon us I'm seeing a slight drop due to the reformulation. About 30-31 mpg.

Sucks having both an Auto and a SULEV engine. I'm -4 in the mpg department to begine with.

Posted by: Bobzilla Dec 15 2006, 03:39 PM

Personally, I couldn't tell you. THe wife's been driving the car for the last 3 weeks.

Posted by: RHINESEL Dec 15 2006, 04:05 PM

My wife has a lead foot and uses my car to run errands once in awhile. You can almost watch the needle go down when she does city driving.

Posted by: adamemc2 Dec 18 2006, 08:45 AM

This weekend I made a trip of about 130 miles and only used 1/4 tank. That's about 520 on a single tank!

Posted by: southpawboston Dec 19 2006, 10:35 AM

not possible... you can't estimate your mileage based on how far your needle has moved on the gauge. the only accurate way to measure is to start counting the miles after a fillup, then refill and divide the miles between fillups with the number of gallons it took to refill. it's extremely rare to get even 500 miles on a tank...

Posted by: thunderabeGLS Dec 19 2006, 01:44 PM

^ true, i drove 91 miles after a fill up on sunday and needle barely moved.

Posted by: JedimanGLS Dec 19 2006, 03:29 PM

I swear the Elantra ages better than Cheese and Wine!
I just hit 30k miles, and during my trip down and from Florida from NH, even with two heavy as hell suitcases and extra stuff in the trunk, I managed 36+ mpg...and the car is rated for a max of 32...I was so psyched! My car has been getting beautiful gas mileage!

Posted by: cclngthr Dec 19 2006, 04:08 PM

When I drove to Vancouver WA from Tacoma for the engine management workshop, I had just above 2/3rds tank and when I got back in town, I had a 1/4 tank left (300 mile trip round trip). I had a couple 120 mph jaunts so that brought the mileage down a bit.

Posted by: elantraelite Dec 19 2006, 07:44 PM

The best I have ever got out of my Elantra has been 453miles (730km)

100% of that was highway driving at 60mph (100km/h)

Add in the weight factor- I had 4 passengers with me and their luggage. Overall I thought it was outstanding mileage.

I used regular Shell fuel.

Posted by: thunderabeGLS Dec 19 2006, 08:16 PM

i forgot to mention that i put 14.703 gallons in my tank this past saturday night.



the gas light hadn't even been for ten miles.

Posted by: silet Dec 19 2006, 08:52 PM

I just got 8.26 gallons for 303 miles. That is the second time in a week. The other was 8.5 gallons with the same mileage.

Posted by: blmqzjc Dec 25 2006, 08:50 AM

I just got 38mpg on a trip from Palm Coast, FL to Atlanta, GA (425 miles) with FP60 additive. Drove around Atlanta for about 200 miles, average dropped down to low 30's mpg (more stop and go but still lots of xway), but still impressive mpg. On the return trip, I got 37.9mpg with Lucas UCL additive. Never went over 75 mph - cruised at right around 70 mph most of the time both ways.

A virtual dead heat with the two different additives. Car is a 2005 GT hatch 5 spd.

Posted by: Hon-Day04 Jan 25 2007, 06:20 PM

I just returned from a trip. On the way there, 80-85MPH and got 31.9MPGs when I calculated the mileage. I came back today, 70-80MPH and have 365miles with theneedle just below the 1/4 tank mark. I'm sure I'll get 400 miles to this tank...I hope. I'll calculate and repost. My inlaws borrowed my car for a trip a while back to go to FL; I had them write down their mileage and gallons they put in so I could calculate the mileage. Would you believe they got 41.9 MPGs on one tank!!!!!!!!!!!!! I could believe the calculator when I figured it up. I know they didn;t go over 70MPH..and probably had the wind with them !!!!!!!---Hon-day04

Posted by: Doohickie Mar 26 2007, 08:21 PM

Got 416.1 miles on my last tank for 31.0 mpg. It was mostly highway.

Posted by: Ishtar Mar 26 2007, 08:26 PM

Are the additives magical? Because I can get 36mpg without them! Don't you think that if they were THAT good they'd just put them in gas for everyone?

Posted by: Goldenguy Mar 26 2007, 09:46 PM

22.26MPG on my last fill. Not too bad considering I wasn't always exactly light on the throttle. Best city mileage thus far.

Lifetime mileage is currently 21.09, but my driving has been about 3% highway.

Posted by: BNystrom Mar 27 2007, 05:47 AM

It's a classic case of assuming something, then using unrelated evidence to support one's assumption. Absent a test without additives, the only thing his results prove is that his car gets good highway mileage. His mileage was good, but it's not unusual for an Elantra on a straight highway drive.

Gasoline additives are unnecessary and a complete waste of money, just as oil additives are. He would have gotten the same mileage without them, but would have arrived home with more money in his pockets.

Posted by: cobas Mar 27 2007, 08:10 AM

I've been getting 22-24mpg for a good while now. The thing is my commute is 5.4mi / 15min = 22mph with a bunch of traffic lights, so I guess it's 100% city. We drive up to Baltimore most weekends but that doesn't seem to help overall. Sometimes I try to drive very gently to see what the max fuel economy could be... but I can't do it more than two days. Eventually I forget and have a little fun and it immediately kills the economy. My car's older and missed out on the CVVT system, so that's another 3-4mpg down. I should mention I'm using wider 205/45/17 tires and the wheels are not light.

EPA Ratings (2.0 Elantra, 5sp manual)
2001-2003 (XD1, no CVVT): 24/33
2004-2006 (XD2, w/ CVVT): 27/34
2007- (HD, w/ CVVT): 28/36

My previous commute a few years ago was 25mi in 37 minutes, so about 41mph and probably 80% highway. I seem to remember averaging 29mpg or so there. :\ bleh Fuel economy not the XD1's strong point.

Posted by: QuickSilverSE07 Mar 27 2007, 12:15 PM

2007 HD with less than 3000 miles.

lifetime avg so far is 28.4
best ever was 32.2 doing 80mph on cruise control - 100% highway (with a few agressive catchups after the slow pokes moved over from the left lane)

Posted by: Ishtar Mar 27 2007, 12:19 PM

So its a weight reduction mod?

Posted by: HeadOfMax Jun 20 2007, 01:39 AM

I'm getting 23-25 MPG all city. Thats driving like an ass too.

Posted by: Doohickie Jun 20 2007, 07:48 AM

Since putting on my 225/50R15s, my mileage has definitely dropped, compared to the OEM Michelins. I guess the better traction and wider patch translate into greater rolling resistance or something. Or maybe I'm just pushing the car harder now. I was getting about 29 mpg tank to tank, and now it looks like it's less than 27.

Posted by: Seinster Jun 20 2007, 08:12 AM

27.35mpg on my last fill up.

That's 8.6L/100km
or 503km to 43.43Litres.

100% city driving.

Posted by: cjgt2 Jun 20 2007, 10:16 AM

I'm getting bout 28 mpg on a 65/35 highway/city mix. Not bad for a 6yr old car with 115,000 on it.

Posted by: Doohickie Jun 22 2007, 01:16 AM

How is it running? I'm amazed at how many people have Elantras at 100,000+ miles and they run well.

Posted by: dc08 Jul 6 2007, 11:34 AM

with 83K on the odometer, we get 26.6 to 27 mph. Mostly suburban Joisey driving (hostile, stop & go, and excessive use of anemic horn).

DC08

Posted by: Bobzilla Jul 6 2007, 11:40 AM

After our 36-38mpg run to NC and back, she's back to the daily grind and averaging 32mpg since we got back.


Edit: If it didn't sound so good around town I would probably get better

Posted by: Silent Wolf Jul 6 2007, 11:22 PM

Ya that CAI is a real gas eater
Mine is about 300 to a tank, 13 gal fillup, so about 23mpg or so. All city right now with a small bit of US1 driving, but still through city.

Posted by: nippjas Jul 12 2007, 07:37 PM

66,000 miles still averaging about 29-31 MPG HWY, avg speed about 75-80.

Posted by: gonzo777 Jul 12 2007, 11:29 PM

Still running my summer 28+ mixed

Posted by: Krad Jul 13 2007, 03:00 AM

Unless my the trip computer is lying to me, I get only 18mph and I'll hit 19 if I get lucky and drive like a normal person. Would anyone please let me know why they think this is happening?

I flushed the engine, cleaned transmission lines, replaced oil filter, new oil (high mileage) and still nothing (have SRI). I brought the car used with about 81,000 miles.

Posted by: saturn Jul 13 2007, 08:31 AM

mine is crazy too. I never get better than 22mpg

right now it's stuck on 21.7 mpg

when I bought the car it was at 27.9 but it started going down as soon as I drove it off the lot

maybe I drive like a nutcase? cheap (low quality) gasoline?

Posted by: fgummett Jul 13 2007, 08:59 AM

Your trip computer may be lying to you... the only way to be really sure is to keep a log of fill ups and miles driven e.g.

...
Fill tank 1st Jan 2007, with 5 gallons, odometer reading 10,000 miles
Fill tank 10th Jan 2007, with 10 gallons, odometer reading 10,300 miles
...

the first fill just lets you know you started with a full tank, the next fill tells you how much gas you used for the mileage... that equals 10 gallons to drive 300 miles or 300 / 10 = 30 mpg

Remember not to overfill the tank by "topping up" as this can damage the emissions system.

Accuracy/reality increases if you average this over multiple fill & drive cycles, ideally using the same pump at the same time of day to fill up.

I find the trip computer prefers to go down in terms of economy rather than up... in other words it seems to take a lot more economical driving to show improved economy than it does for spirited driving to show a reduced mpg.

By the way did you know you can reset this meter by holding the switch in a few seconds. At first it is very sensitive but after a while it settles down again.

I find that keeping the revs between 2 and 3k will lead to best economy but as soon as you start regularly going over 3K the economy takes a nose-dive... of course 3k is also where our engine really comes to life

There are other tools such as the http://www.scangauge.com/ that will give you real time readout of mpg (l/100k)

Posted by: Midnightsky Jul 13 2007, 11:38 AM

My gauge usually says about 11.7 L/100 or w/e the guage lable calls it.....is that good or bad?

Posted by: fgummett Jul 13 2007, 12:51 PM

Well I think Hyundai quotes something between 6.3 and 9 litres per 100 kilometres on paper so it's not too good...

I'm getting low 8s when I am good and high 8s - low 9s when I am bad

In case like me, you grew up with "mpg" here is the math:
1 litre = 0.26 US gallons and 1 kilometre = 0.62 miles
so
100 kilometres = 62 miles and 11.7 litres = 3.04 US gallons, which (if my math is correct) converts to 20.1 mpg... ouch

For reference:
6 l/100k = 39.7 mpg
7 l/100k = 34.1 mpg
8 l/100k = 29.8 mpg
9 l/100k = 26.5 mpg
10 l/100k = 23.8 mpg

Posted by: Krad Jul 14 2007, 04:38 AM

Never did think to keep a log. Yea, I reset my trip every time I remember when I fill up.

I always fill up at the same station and the same pump every time for about 3 months now. He's the only man that lets me pump my own gas. I live in NJ and it's illegal to pump your own gas or something. I find it that we're just too lazy.

What is "topping up?" Is that like "Fill it up" or "Fill'er'up?" I never knew that damaged anything.

Posted by: fgummett Jul 14 2007, 10:21 AM

In the same way that you can reset the "trip" reading you can also reset the mpg/economy reading by holding the button a second longer while the computer is on the mpg/economy reading.

"Topping-up" refers to pressing the pump nozzle repeatedly after it has automatically shut off to get as much gas as possible into the tank and fill pipes. The Elantra uses a evapourative emissions system to capture gas vapours rather than let them go free into the atmosphere... this system can be damaged if gas gets directly into it... damage would result in a CEL.

Posted by: Krad Jul 14 2007, 09:16 PM

Oh Ok. I guess I could stop doing that. The only reason I "top up" is to get let's say $35USD instead of 34.81USD.

Yea, when I refer to "trip" I mean the whole computer, not just the Trip reading.

Posted by: Midnightsky Jul 15 2007, 03:52 PM

I am very concered about that number of 20.1mpg......now I do drive fairly hard a few times each tank either havin fun or tryin to catch up to my schedual. This means 4000-6000rpm per gear when I am doing that but I try hard to not go past 4000rpm per gear otherwise. I am going to start writting a log of my fill ups with KM and how many times I go past 4000RPM per tank as well to see if my driving is really affecting it that badly or if I've got another problem that needs to be located. 20.1 mpg.....OUCH is right

Posted by: sargeants Jul 15 2007, 10:03 PM

So far I've been running around with 6.7l/100km the lowest(nearly 800kms/tank), and 9.8l/100km the highest; average driving has been around the 7.8-8l/100km

this weekend has been on the higher side after some changes... gotta test them out.

Posted by: Midnightsky Jul 16 2007, 01:29 AM

I must be losing MPG to my tires- 205/40/R17's so I dunno wat else is making me lose MPG other than my foot. I am doing a month long test of NOT going past 3000RPM and we will see how she does. I will reset the fuel ETA/trip meter and go from there. Wish me luck all, I'd luv to get some good MPG and maybe save up money to actually get some more mods done.

Posted by: sciphi Jul 16 2007, 10:25 PM

28 mpg in 70/30 city/highway driving, mashing the gas everywhere. Love that lightweight flywheel! And proper inflation pressure on the tires.

Posted by: Bobzilla Jul 17 2007, 05:00 PM

Just filled up today. 31.2mpg, that's after racing it Sunday. Oh, and I DO have a low fuel light. I saw it fora very brief moment today. took 13.8 gallons to fill!

Posted by: Tommy Jul 19 2007, 09:42 PM

Had my best tank ever today. Drove basically all day for work so about 95% highway. 340 miles on 9 gallons. Almost 38mpg.

I average 34-35mpg on tame driving. If i take the back roads home through the twisties pullin between 3/4th gear a few times during the week, ill get 31-32mpg.

Posted by: Midnightsky Jul 19 2007, 09:56 PM

Ok guys, something is DEFINATELY wrong with my MPG, even with driving a tank under 3000RPM over 90% of the time I am still not below 10.3L/100.....so that works out about 22MPG.......not liking that one bit....I had the thing down to 9.x once but haven't seen it below 10.x say for that one time......any ideas?? I even reset the thing and I'm still getting nowhere......i am a student and really could use the MPG so any advise would be greatly appreciated

Posted by: Ishtar Jul 19 2007, 10:02 PM

Drive the speed limit.

granny shift.

Posted by: Tommy Jul 19 2007, 10:55 PM

plugs, plug wires, tire pressure, o2 sensors.


i short shift every gear usually. hardly ever take it past 3k if im in normal driving, and thats about what i cruise at on the interstate.

Posted by: RHINESEL Jul 19 2007, 11:57 PM

How much city are you doing? While our cars get pretty good highway mileage, they get pretty poor city mileage. Idleing at stoplights, stop and go, ect all play a big role even though you are under 3K.

Posted by: Krad Jul 20 2007, 12:02 AM

My previous post I mentioned how I was getting some very crappy MPG numbers. Well, I had forgotten that I had went to the track about a month back and tire pressure was... down the drain. So I went into my garage, filled the tire... and bam, increased my MPG by 5miles so far. Saturday I'm going to do some major traveling so I'll post a small sheet about how just 5PSI can make the difference.

Posted by: Midnightsky Jul 20 2007, 03:26 AM

I have been during my test tanks....lowest i got was 9.x




I plan on doing plugs, may as well do wires now, and tire pressure i keep a VERY close eye on and it sits 35front when warm and 33rear when warm.



I don't have much stop and go driving it's usually 10-20minute drives with about half of that being on the freeway. I do all city driving.



I don't think I should be losing a ton of MPG off the increase in tire pressure but who am i to say.....

Posted by: fgummett Jul 20 2007, 08:38 AM

Try setting your tire pressures when the tires are cold.

Posted by: Midnightsky Jul 20 2007, 05:11 PM

Something amazing happened this morning on my freeway commute to school. I turn it to watch the xxL/100 and see how it was doing during my drive. To my absoutely SHOCK and JOY i saw the meter go down to 6.9L/100 YAY, I was so excited and so happy, esspecially after the night i had b4. It slowly went down .1 at a time and just b4 i got off the freeway it hit 6.9L/100. So apparently my car is doin ok now and I will continue to monitor the xxL/100 and see how it reacts to my driving.

Posted by: 02CanGT Jul 20 2007, 09:08 PM

Just asking, but have you reset the trip computer? This will reset the accumulated average....

Posted by: RHINESEL Jul 21 2007, 05:04 PM

What about air conditioning? Do you use that a lot? That would rob some MPG.

Posted by: Midnightsky Jul 21 2007, 08:12 PM

Ya I use AC on and off depending on how i feel like driving and hills and stuff..........STILL ANOTHER PROBLEM, so this morning i see my xxL/100 hit 30 OMG ACK that is HORRIBLE......So........is something else maybe wrong with my car???? I seem to be getting some better MPG now so i don't think im actually doing 30L/100.......wat else could be wrong or am I somehow actually doing 30L/100 with no AC on and only redlined one gear this morning and the rest were only up to 4500RPM cause I was early for work instead of late...........I DUNNO WTF ACK

Posted by: RHINESEL Jul 21 2007, 08:33 PM

What's your average freeway speed? Mileage seems to drop pretty quickly after 70 mph.
---------
Have you confirmed this with good ol' pen and paper math? Fill up and reset trip odometer to zero. Next fill up note how much fuel it takes to fill up and how many miles/kilometers driven and do the math.

Posted by: Midnightsky Jul 21 2007, 09:07 PM

My average freeway speed is 120km/h and the last time on my way to school I saw it drop to 6.0L/100 so I really dunno wat to think when this morning on the way to work, stopping at 5 lights, that's it only 5 lights with about 2-5mins driving between each set.......so it just seems weird that it was saying 30L/100...........ACK

Posted by: Ishtar Jul 21 2007, 10:01 PM

If you did 100km/h (the speed limit) you would see even better gains.

Our cars save the most fuel between 85-90km/h

Posted by: Midnightsky Jul 21 2007, 11:09 PM

Ish that isn't the problem here, the reading of 30L/100 can't be right, something is off about that.

Posted by: Tommy Jul 22 2007, 10:24 AM

I run mine at around 45psi, noticed decent increases vs 35psi. Youll always get better mpg off higher pressure because youll have less rolling resistance.

im usually in 5th gear as soon as i can. if i know ill be at the same speed for a bit, ill put it in 5th. I also always use the AC, so i dunno what your guys problems are. 34-35mpg average for me most weeks. i do a lot of highway though, and my 38mpg tank was 95% highway.

Posted by: Midnightsky Jul 22 2007, 12:30 PM

Are you not running the risk of a blowout because of the high pressure?? 45psi?? seems a little high for daily driving

Posted by: billy_b0b Jul 22 2007, 01:01 PM

i have about 1/4 of a tank before i fill up... should be sometime next week

i will calc the mpg i got off this tank and report

last time i checked i was at 31.3 mpg. that was about 23K miles ago.

Posted by: Tommy Jul 23 2007, 01:11 AM

na, no where near it. Look on the sidewall of the tire and it will tell you what its rated to. i think the stock michelens that ive got at the moment are good for something near 60-70psi. I run around 45 because any higher and the ride gets a little harsh, and they dont grip quite as well in higher speeds.

its kind of a compromise though with pressure and handling. lower and youll have great traction, but lots of flex in the sidewall. higher and youll have stiff sidewall, but not as much traction on the tread.

ive run 40-50psi in several cars/sets of tires for years and never had any problems, never noticed increased wear.

Posted by: billy_b0b Jul 24 2007, 10:56 PM

i just checked.... 26 mpg on my last tank

Posted by: Ishtar Jul 24 2007, 11:02 PM

So, uh, why would hyundai say 30/30 on the door jamb if they could get better fuel economy at 45psi safely?

You do also realize that as the tire heats up it expands right? so what might be 45psi cold may rise to 50-60psi at highway speeds.

?

Posted by: winc Jul 25 2007, 06:49 AM

You're not going to get very respectable fuel economy driving in that manner. If you're looking for economy, try shifting around 3000 rpm or less and avoid jackrabbit starts. Throttle position greatly affects mileage, so flooring it and shifting at 3000 rpm is not going to net very good numbers either. I dunno, if you want to get better fuel economy, might be a good idea to put a 1" piece of wood under your gas pedal to limit how far you can mash it.

Posted by: Bobzilla Jul 25 2007, 07:00 AM

wIFE FILLED up yesterday. This was the tank we went to Ft Wayne and raced on. 33.3mpg.

Posted by: MEly Jul 25 2007, 08:44 AM

Midnightsky,

I'm wondering, are you resetting your mpg gauge all the time or do you have the Tibby Multigauges installed to show your instantaneous mpg. Reason I ask is because if you're resetting your trip computer gauge, you're better off just letting it settle down over a few hundred/thousand kilometers. That's the only way you'll truly know what you're getting.

When I first got my car I scared myself to death by resetting the gauge and running the AC at a stop light. My car was at 30+L/100km and increasing. Now, overtime and with lots of city and some highway (probably 70/30 up to 55/45 depending on the day) I average between 9.9 and 10.1. I drive fast sometimes but do my best to get my auto to shift into 4th ASAP, try not to push too hard on the throttle or go much past 3000RPM.

Anyway, those are just my thoughts.

<edit for wording>

Posted by: fgummett Jul 25 2007, 11:10 AM

I agree you need to let the computer settle down somewhat... it is very sensitive when just reset.

I also use a http://www.scangauge.com/ which can provide second by second economy figures and I find it useful sometimes to train my Right foot... especially when going uphill, it is surprising how far I can back off the gas while still maintaining the same speed but better economy.

Posted by: Seinster Jul 31 2007, 07:47 PM

Post K&N Filter install:
32.2 MPG
7.3L/100km
or 533km to 39.23L

75% highway speed (100km/h)
25% city driving
& Lots of hills!

My best figures yet.

Posted by: gaster Aug 11 2007, 11:51 PM

I just had to drive from near Chicago to Atlanta for a large convention.

There were about 50 or so of us waiting for a nice big bus from a national bus company, but they screwed us and had no bus ready. Of course we found out about this at about 10 pm which was 4 hours after they were supposed to show up. They lied over and over and had even said the bus was on the way once. Anyway, our only option was to drive to Atlanta the next morning.

I had to keep receipts for gas and everything. I drove 1511.8 miles round trip and got 29.6 mpg. That was almost 100% highway driving at over 80 mph most of the time. Top peak speed according to the GPS was 92 mph.
Not too bad for a car with 104k miles. It's a 2002 5-speed car. Intake resonator removed and K&N filter installed.

Posted by: jamhandman Sep 4 2007, 02:29 PM

I have one of the 2007 Elantra SE PZEV models. Have 3300 miles on the car and did an oil change. Was getting according to the trip computer around 31 MPG with about 20% highway driving. I usually use the AC when on the highway and in the city I'll open the windows, unless it was a really hot day. After doing a change of the oil this weekend, used Mobile 1 5w20 Fram Filter, I was able to get the trip computer to read 38.7 MPG on a highway drive with the A/C on. After getting my car filled up I always reset the MPG on the trip computer to have it recalculate for my current fill up. This i the highest I've ever seen it.

After driving to work today my car now says 37.2 MPG. We'll see if I'm really getting this during my next fill up. (My calculations have been very close to the trip computers calculations, so I trust it)

Posted by: Frick Sep 4 2007, 02:42 PM

I got my Elantra on Saturday from Winc. It still had about 1/4 tank left and Winc had managed to get 37 mpg according to the trip computer. I drove more aggressively on those first few entrance ramps and stop lights, but still ended up getting 510 miles on a tank before I filled up.

On Sunday driving from Souther IN to Norther IN I managed to get 34 mpg gallon on 2 lane highway driving 45-70.

Posted by: winc Sep 4 2007, 04:07 PM

^^^ yep, 37mpg through the mountains even, from the coastal plain of NC to Charleston WV.

Posted by: Bobzilla Sep 4 2007, 04:08 PM

That's about what we got too in the same area. I think the Elantra just likes that region.

Posted by: smbkrun3 Sep 8 2007, 09:21 PM

1st tank on my new 2007 Elantra I got 31mpg with mixed hwy and city driving, I just rolled over the 600 mile mark. Not sure if that is good or not, I know they get better milage once they are broken in.

Posted by: Johnadam6986 Sep 10 2007, 12:02 PM

I have taken one long trip thus far in my new 07 HD i have gotten just under 500 miles stretching past the E hash giving me 34.48mpg , but in my everyday driving i haven't gotten past 400 miles to a tank which is something like 27.59mpg

Posted by: kpantz Sep 12 2007, 09:19 PM

First tank for me - 28 mpg - all back roads, no highway. I tried to follow the break-in directions not to hold at a constant speed for too long during the first 600 miles. Now at about 400 miles on the car, I need to do highway tomorrow. Oh well, it's the thought that counts.

The next tank will have at least 200 highway miles, so we'll see what happens.

Posted by: RHINESEL Sep 12 2007, 10:56 PM

You can still vary your speed somewhat on the highway. Give it a little gas here, a little reduction there....

Posted by: greg841 Sep 13 2007, 07:18 AM

My '04 has averaged between 21 and 23.5 with about 80% short driving (city) with the A/C on at all times. Still wonder if that is a little low?

Posted by: jimnran Sep 13 2007, 06:52 PM

My '04 gets 28 with LA traffic and my wifes '07 gets 17 just around town. We drove from NC to SoCal last year in our '04 and we were getting 36mpg the whole time. It was great!!

Posted by: greg841 Sep 13 2007, 07:19 PM

Is your '04 auto or manual? How often do you use A/C?
In Tampa, it's quite necessary just about ALL the time from about April until November!

Posted by: amyscar Sep 14 2007, 10:23 PM

Why do i barely get 20 mpg in stop and go??

Posted by: Frick Sep 14 2007, 10:31 PM

How do you drive, do you take off like a F1 driver, or do you shift below 2500 RPM. When you say stop and go, how much stopping and idling? There are alot of factors that go into mpg. Do you have wider, stickier tires? Do you have an automatic or stick? Have you checked your air pressure lately?

I've been averaging between 30 and 32 in in town driving. It's boring, but saves money. I had a little more fun on the way home today and the trip computer dropped significantly in the short 4 mile drive home.

Posted by: amyscar Sep 14 2007, 11:19 PM

it's an auto and i guess i take off 2 fast. maybe 3 to 4000 rpm. i better check the tires 2. thanks.

Posted by: MusaKone Sep 25 2007, 08:37 PM

I got 28 mpg on my first tank and 31 on the second. I'm trying to beat that now on my third tank. Bought a 2003 5 spd with 54000 two weeks ago. MusaKone

Posted by: bdiggy Sep 25 2007, 10:43 PM

Average 30 mpg in the 04 w/ the stock alloys. With the 18's only getting 25.8 mpg. They're flippin' heavy!

Posted by: Silent Wolf Sep 28 2007, 01:46 PM

Got 26mpg on my last tank with 30% C / 70% H and some hot doggin.

Posted by: blkhd07 Sep 29 2007, 04:41 AM

Elantra SE PZEV
Had the car 5 weeks.
Odometer: 730 miles


Just filled my tank for the second time(third tank of gas overall, since dealership gave me a full tank to start). According to the trip meter, the average gas mileage on this second tank was 27.2mpg, which to my relief is a lot better than the 23.9(or so) from the first tank. This car is supposed to get 26/36! And the mpg from that first tank was making we wonder if I should've sprung for a Prius!

Tonight on an 8 mile stretch of highway I averaged 38.5 mpg at the end of the stretch, so that was pretty impressive. So I guess the engine/transmission is breaking in OK.


I just started a blog on my Hyundai ownership experience.
Lots to write about now, but don't know if I will keep it going beyond the first oil change.

http://www.hyundaiowner.blogspot.comwww.hyundaiowner.blogspot.com

Posted by: jtees4 Nov 17 2007, 06:29 PM

I had an 03GT (now my sons) and an 05GT (now my wifes) before I got a 2007SE. I love the car, but I am very upset with the mileage. I have been getting 25 in mixed driving.....used to get 29 on the 03 and 28 on the 05 for the exact same trip. Very disappointing. I know the new car is heavier, but I also read that the engine is more fuel efficient. Of course, when I went in and took care of the odometer recall that only made the mileage a little worse. I'm unhappy.

Posted by: sunnyja Dec 1 2007, 08:57 PM

2006 GT automatic here. about 4K miles driven total. i read this entire mileage discussion... i thnik the later model automatics do not perform in city traffic up to posted mileage. i regularly get 15-16 per gallon in true city driving (NYC). that's with stock pressure (33front/32rear) and granny coasting whenever possible, stock tires, no extra weight. my car is in good repair, kept in a garage... i use premium or mid-level major brand gas. i get my numbes off the trip computer.... and i normally see 14-17... a long trip gets me to 17/18 while short-trip weeks keep me at 14 and change. yes - highway i have gotten 30+, but my day-to-day is embarassingly low. might as well have got a jimmy or an explorer.

i want to encourage other 06 automatic owners who do real city driving to post... i can not be the only one. all these 20++ mileage guys seem to be manual trans or not actual city driving. i may add to tire pressure and maybe even sensors... but i doubt there will be a big difference. fact is, i think this car just has crappy city mileage. we might as well admit it.... maybe hyundai will get the message. maybe the 2008 hatchback will have better performance?

Posted by: Seinster Dec 2 2007, 07:21 PM

33.1 mpg on my last tank! or 7.1L per 100km
Absolutely thrilled with that number! It was a pleasure seeing my trip-meter saying over 600km for once.
80% highway, 20% city.
A/C on 10% of the time.

Posted by: Silent Wolf Dec 2 2007, 07:30 PM

27.4 on last tank with 85% highway and very little AC usage. (and just read 12k near end of that tank)

Posted by: sargeants Dec 2 2007, 07:34 PM

over the past couple tanks I've been averaging about 8.0L/100KM - now that's been about 60/40 city/highway
when I first got the car when it was more 30/70 city/highway I wasn't going over 7.4 - actually had it read 6.5 once

Posted by: Seinster Dec 3 2007, 02:20 AM

I don't trust numbers taken from the trip information calculator (I forgot what they're called!).

The only way to calculate the real gas mileage is by taking the total number of miles driven and dividing it by the number of gallons used to fill the car up.

Posted by: Bobzilla Dec 3 2007, 08:53 AM

^Same here. . .although I don't have one of dem fancy computer thingy maginy's. . . Last tank was 34.1mpg. Unfortunately the tank before was 30.3 so the two averaged out I guess.

Posted by: Stevetheriddler Dec 4 2007, 09:48 PM

I have had the car for 7500 miles and have averaged 34mpg over the whole distance. That number will likely end up at 35 after a while.

Posted by: mlumz Dec 5 2007, 03:38 AM

Wondering what mpg are getting in winter? I've always gotten 25-30mpg city while in FL but now in NJ (getting cold) I'm not getting better than 18-20mpg (city). What is going on?

Posted by: Bobzilla Dec 5 2007, 08:01 AM

Much colder air, winter mix gas. Combine that with a lot of idling time in city traffic and you're about right. I think I got 22-24 in the city in the winter time. Thank god I moved.

Posted by: onenoob Dec 22 2007, 10:46 AM

After driving about 1866 kms with a used elantra, I've been averaging about 7.75 L/100 km.

I drive mainly 75/25 Highway/City driving. At least half of that highway driving is through congested traffic during rush hour (like no more than 40-60 km/h). I also recently got winter tires too.

While I'm light on the pedal, I'm hoping my fuel economy will improve a bit further once it's summer time and I"m back to summer tires.

Posted by: gt5 Dec 27 2007, 08:34 AM

most of the replies to this posts are useless/confusing info. since they relied in vacuum-sorry trip "computer"..
speed kills economy in a small engine more than a big one if you drive over 70 constantly you are driving the wrong car n if you always in a hurry in the city expect much less , if we combine big city* with small city will be fine 18 to 24, ad up hysterical to the mix n you better off with a big V6 or a bigger budget , for Lil we get Lil.*

* n for the NY guy few posts above this was my rendition of: admitting this cars are no so good on gas.

Posted by: mdon Jan 7 2008, 08:26 AM

Hi, I'm new to this, I have a 2002 model 2.0 Turbo Diesel elantra (british) I get on average 44.2 MPG driving around town. Worked out by myself as I don't have a trip computer.

MPG is important to us brits as we pay £4.95 per gallon of diesel and £4.77 per gallon for petrol/gas.

Posted by: highpark Jan 13 2008, 08:49 PM

I have a 2000 Elantra with automatic trasmission and am getting 300 kms or 185 miles when I fill up 40 litres (11 gallons) of gas. That's agout 13.3 l/100 kms or 19 miles to the gallon. i was hoping for better. I'm thinking about changing my tire size from 195/60r14 to 185/65r14. The car isa tuned up and I keep my tire pressure at 30 psi. Any comments on this ???

By the way, I do all city driving. Stop and go. I'm almost never on the highway...

Posted by: popeye Jan 13 2008, 09:46 PM

There's the answer, hit the freeway more:lol:

Make sure you ease on the gas at take off and try to watch you driving habits all around. Higher PSI may help a tad but it's questionable. The biggest factor is the AT, they soak up the energy the motor delivers to the wheels and you can't do much if anything about that (within reason).

Posted by: Silent Wolf Jan 17 2008, 09:05 AM

Bit better lately, been following Pop's advise on the fill up and only filling to the first click for the measuring. Got 348.7 miles and filled up 11.9 gals so works out for a total of 29.3 mpg. One of my best tanks so far.

Posted by: Bobzilla Jan 17 2008, 09:08 AM

Yep, an auto in city driving = pooh.

Posted by: MEly Jan 28 2008, 09:26 AM

My most recent tank has been pretty well amazing. I've driven about 520km and have about 1/4 a tank left. So far it's been an 80/20 mix of highway/city driving, but this tank is on par to score me around 700km. I've never topped about 620 before. God I love the fuel economy of this car sometimes

Posted by: Doohickie Jan 28 2008, 11:19 AM

Yep. The autotragic tranmission kills me. I wish there was a way to set the conditions for the shift points. When I was driving my 5-speed Aspire with less than half the power (a whopping 63 hp), I short-shifted all the time and would be up to 5th gear by 40 mph without lugging. When driving in the city, the Elantra's transmission hangs onto third gear longer than I would ever leave it if I were shifting myself. When getting on the freeway it won't shift to 4th until I'm fully up to speed and backing off to maintain.

The Elantra has more than enough torque to sustain lower rpms a lot more of the time. I wish they had an economy/power button that would move the shift points.

Also, since I put on my wider profile tires, the mileage is worse (I'm guessing from increased rolling resistance). But then again, I *really* like the road feel with this tires.

Posted by: Bobzilla Jan 28 2008, 02:18 PM

If I did the math right that's about 385 miles? I'm disappointed if I DON'T get that!!

Posted by: cobas Jan 28 2008, 05:28 PM

I did a rare 2-hour perfectly-symmetrical highway trip the other week and got about 33mpg driving pretty efficiently (because I had about one gallon left!). That's sticking to 60mph, low traffic, few stops and gentle acceleration, cruise control, etc. However on my daily commute I'm lucky if I can get the 24mpg city rating - it's now all suburb/city driving with several lights even on the long stretches.

I often reset the meter and try to see how high I can keep the fuel economy that week. Then 5 minutes later, a light turns green, I squeak the tires off the line, get into 2nd at 5k or so... and it drops down to like 16mpg and I'm like "Awwww F*** me... oh well." Every time. It's like how many licks does it take to get to the center of that Tootsie Pop. I don't know that either.

Posted by: MEly Jan 28 2008, 06:12 PM

Well then... don't I feel just a wee bit humbled. I dunno - 700 km/tank works out to 7.8L/100km which IMO is pretty snazzy. I dunno though, this is the first car that only "I" drive so I find that in general the fuel economy is much higher since my parents (I know this is backwards) tend to accelerate much more heavily than I do.

Posted by: sargeants Jan 29 2008, 02:14 PM

Depends on how you're driving around TO - and where the past couple tanks I've been getting 8.5L/100km....
This tank I'm starting to smarten up a bit and save a bit more... right now I'm sitting at 560ish, and got more than a 1/4 to go - should give me around 740 for this tank. Best I got was complete highway driving (get up to speed, cruise) and rolled just over the 800kms - I had hit 6.5L/100 at the end of the weekend. - now that's good

Posted by: MEly Jan 29 2008, 02:28 PM

Dude - how much highway driving are you doing? lol - maybe I need to do some mods to get myself up that high. Get in a new air filter (AEM or something)...

Posted by: sargeants Jan 29 2008, 04:49 PM

well it's a 25km trip to work... but that's across the 401 and up the 404
- almost every weekend I'm putting on around 500kms (London&back)
With driving for work, and lately there's been a bunch of highway drives (150kms today)
I've been doing my shifts around 2000rpm this tank - slowly getting to where I need

mod it up!!!

Posted by: MEly Jan 29 2008, 07:58 PM

Yikes - the trip to London on a weekly basis? That can't be fun. Wish I could shift around 2000rpm, unfortunately, my automatic doesn't let me. I rarely take it over 3000 rpm though but in general I do a LOT of city driving. I used to do 404-401 to my gf's place, but then they started with all the construction on HOV lanes etc... and I slowly stopped. Never really got back into it. Sadly - parking at Finch most days doesn't let me take the highway at all on my way down to my lab. God I wish I worked somewhere off the 407.

Posted by: Silent Wolf Jan 31 2008, 10:15 AM

Cant bring myself to shift below 2500rpms and usually go 78mph on the highway. Average i see is ~26mpg

Posted by: mdon Feb 4 2008, 07:57 AM

just filled up yesterday and it worked out that I got 48.9mpg over 430 miles!!!! Diesel is the future!

Posted by: CelticHarp Feb 13 2008, 04:25 PM

Your posts about the great mpg are part of the reason I'm hoping an Elantra GT can serve as my harp-mobile. Please read my post on that) One person mentioned that he was using premium. I'm replacing an older Jetta and I still can get from the near border Orange County to the San Francisco/Bay area via the 5 fwy (just a little over or under 400 miles depending on my exact destination) on one tank using cheap Arco gas. What about the rest of you who were geting the great mileage.?

Celtic Harp

Posted by: Silent Wolf Mar 26 2008, 03:43 PM

Arkansas Trip MPGs

1. Melbourne, FL to Little Rock, AR (by way of Atlanta and mountainous Cloudland, GA and thru the snowstorm on I-40)

a. Byron, GA 399.1/12= 33.3mpg
b. Courtland, AL 342.0/9.66= 35.4mpg
c. Little Rock, AR 326.7/10.2 = 32mpg

Total: 1073.7/31.86 = 33.7mpg

2. During the week in Hot Springs/ Little Rock

a. 326.2/11.2= 29.1mpg
b. 202.5/6.06= 33.4mpg

Total: 528.7/17.26= 30.6mpg

3. Little Rock, AR to Melbourne, FL (by way of Mobile, AL and all flat roads)

a. Near Hattisburg, MS 371.7/11.35= 32.7mpg
b. Lloyd, FL 377.8/12.1= 31.2mpg
c. Melbourne, FL 297.3/9.7= 30.64mpg

Total: 1046.9/33.2= 31.5mpg

Combined Average: 31.9mpg

And this was a fairly loaded car (im a pack rat)

Posted by: dav532 Apr 1 2008, 12:19 PM

Just bought a 2008 Elantra GLS last friday and have put 250 miles on it. It took 7.6 gallons to refill giving me about 32.9 mpg. I drove 60% city 40% hwy somewhat conservativley. I enjoy driving the car more than my 13 mpg truck and full size van (5 kids). My savings in gas per month will nearly make my payment.

Posted by: tasdrouille Apr 1 2008, 04:01 PM

I modded my 2008 HD for fuel economy (ongoing process). I now get 37 mpg city and 42 mpg highway.

Posted by: dav532 Apr 1 2008, 04:29 PM

how did you modify it?

Posted by: tasdrouille Apr 1 2008, 05:01 PM

Added a WAI. For FE you want high IAT.
Added lower and upper grill blocks. It's good for roughly 3% better FE at highway speeds, plus it gets the engine up to temp quicker. A hot engine is more efficient.
Upped the tires to 50 psi. Rolling resistance is the main source of drag in city driving. And the old myth of wear in the middle at higher pressure just isn't true anymore with steel belted radials.
Added bigger front and rear wheels air dams.
Switched to lighter wheels.
Running lightweight synth fluids.
I bought a scangauge.

I'll eventually also get a smooth full belly pan, repack the wheels bearings with high perf synth grease, etc...

Posted by: Silent Wolf Apr 9 2008, 03:53 PM

Sorry but thats rather far fetched.

Posted by: Bobzilla Apr 9 2008, 04:22 PM

^ Agreed. . . I might have gone along with it until this part:

Yeah. . . false. Very, very false.

Oh, looks like last tankful was 28mpg. 2-drivers on sunday, twice as many passes AND I beat it all week trying to burn the fuel out before the race. All that beating and all I could get it down to was 28.. .go figure!

Posted by: Silent Wolf Apr 9 2008, 06:31 PM

Maybe you need me driving. 28 is my usual average. I've gotten as low as 25. While my highest was the AR trip with 33+.

Posted by: Bobzilla Apr 9 2008, 07:47 PM

How many miles are on your car now? Mine didn't really get "broken in" until close to 30k.

Posted by: Silent Wolf Apr 9 2008, 08:51 PM

Thought it was said breakin is within 10k.

Mines at 18k.

Posted by: Doohickie Apr 9 2008, 09:26 PM

That's about what I got a while ago. Last year when I got my GT rims they came with a set of Kumho Ecsta AST 225/50R15s. Ever since then, instead of about 27 mpg, I've been getting 24 on average, and even flirt with 20 on occasion.

Well, one of the ASTs got a flat today and it's not repairable. So I'm going back to the stock size (or maybe 205/60R15), in Kumho KH16s. We'll see if my mileage gets better again or if it was just coincidence that the mileage got worse (and maybe I have some other issue).

Posted by: Bobzilla Apr 10 2008, 04:59 AM

WEll, once again real life trumps the book. I didn't start getting my best mileage until after the 30k mark. My best friend with th Sonata just turned 28 k and mentioned his mileage was better than he's gotten before as well. Coincidence? Maybe.

Oh, and my F-I-L with that just bought a Spectra5 was "complaining" that he's "only" getting 30-31 with stop-n go driving and a Jersey style to boot. He's getting ready for his FIRST oil change! I told him to be patient.

Posted by: blmqzjc Apr 13 2008, 09:26 AM

My Elantra seems to be getting better mileage with age too (now at 25K mi.). But I wonder if the gradual increase may also have something to do with tire wear? After 30K Bob, were you still on the factory tires, which would be quite worn by then? Consider the following:

A couple of weeks ago, I purchased a new set of Fuzion HR1's for my other car, a 2001 Passat. The Passat had been getting great gas mileage on OEM Continentals, which were quite worn, so I replaced all 4 with the Fuzions of the exact same stock size. I immediately noticed about a 10% drop in gas mileage. I upped the tire pressure from the 30psi the installer put in there, to about 33 or 34psi, where I normally like to keep it. Noticed maybe a slight improvement. I also noticed on the Passat's computer that the mileage would tend to increase a little after 20 or so miles on the highway. It had not noticeably done that before. I was using the same gas, same driving habits, driving the same stretch of hiway that I always do. The only difference was the new tires.

My thinking is the new tires provide much more "resistance" than the old worn Continentals (duh!), but I wasn't expecting such a dramatic drop in mpg. But after 20 miles or so of hiway driving, it seems to cut the difference in half. Perhaps because of the tire design, materials, etc., it performs better from an mpg standpoint after it really gets warmed up.

I know from this, as well as the Passat forums, that people who increase the wheel/tire size (especially the width), often experience a dramatic change in mpg. But I used the stock tire size. I thought about trying to blame the mpg loss on seasonal gasoline differences, but I live in FL. Also going from a winter (if you can call it winter here) to a summer formulation would tend to improve mpg, so I don't think that's it. Also, the Elantra would be experiencing mpg loss too, since I fillup both cars at the same station.

My conclusion, and point, is that don't underestimate the tires (condition, wear, style, inflation, etc.) when looking for those mpg villians. I really believe they can make a difference (perhaps as much as 10% or more).

Posted by: Canadaman111 Apr 13 2008, 09:39 AM

My first tank of fuel in my 08 elantra got my 26 miles per gallon. That was mostly in town driving. I was pretty happy with that.

Posted by: Neanderthal Apr 20 2008, 11:03 PM

On my first tank (bought car 31 March), not trying for great MPG and with a lot of around-town, I got 36.6. I had to check my numbers three times, I was (happily) flabbergasted.

Today's fill-up showed 31.0. But I believe this tank had ethanol (puke) in it. State just slipped it in a couple of weeks ago.
I'm expecting 40+ on the highway. On real gasoline.

I see some folks see an improvement using premium.
Once I burn off this crap/makebelieve gas, I may try 9 gallons of the Good Stuff if it actually has a + effect on MPG.

Posted by: elantragt Apr 20 2008, 11:13 PM

Good luck on the 40 mpg highway. I think the 36.6 ya got was amazingly good (especially since it included some city) and close to the upper limit of what you'll get. As far as premium, in the long run, it makes little sense with our cars. Stick to 87 octane.

Posted by: Neanderthal Apr 20 2008, 11:16 PM

Guess the autos have advanced some in the last few years.
Mine short-shifts like it was born to it, and as it gets warmed up it shifts at lower RPMs. When cold it shifts 1-2 at 2500 or so, but I've seen it shift at under 2000 RPM when warm and I'm not in a rush.
I also coast to lights or stop signs, providing there's nobody back there who I'm going to hold up.

Posted by: Bobzilla Apr 21 2008, 05:24 AM

Actually, my factory tires have been gone since 10k miles. at 30k I was on 215/45/17 Nitto NT 450's. At 60k I was on the 205/55/16 KH16's. I do notice a differnce between the KH16's and the 225/45 Hankook RS-2's. The 'kooks are stupid sticky and my weekly average will drop to around 29/30 on a race weekend. The wife drove the car last week and averaged 34.3mpg last week and had a 412 mile tank.

Posted by: dav532 Apr 21 2008, 07:06 AM

I have had my 08 Elantra for about 4 weeks and i'm on my third fill up. I got about 31.5 mpg on the latest tank with about 60% being in town driving. I can live with this especially when i was getting about 13-14 in my 00 Silverado. I had to keep the truck, although i don't drive it but once a week, because i own a house with two acres and every man needs a truck. I can't handle the in-laws that want to borrow it every weekend to haul the mulch or shrubs. Get your own!!!! The Elantra is much funner to drive and easier to park then the "extended long bed tank."

Big V

Posted by: mjoshi Apr 28 2008, 01:35 PM

I'm getting 30.4 mpg in mixed driving 40% city , 60% highway. I just had my second tank of gas and because of summer had my AC ON. Interestingly I didnt see any difference in mileage when I had AC ON v/s AC OFF. So far it is bit below my expectation of 32+mpg but mine is just 500 miles old so I think it might improve.

Posted by: Silent Wolf Apr 28 2008, 03:05 PM

Thats good MPG. I'd be estatic if i got 32 with that much city. I get average of 27.

Posted by: jacob Apr 28 2008, 03:07 PM

I've been driving my 2008 HD (2000 kms) like an old lady since I last filled it. I've averaged 35MPG with some trips up to 40MPG. I'm very, very impressed.

Posted by: Chris05e May 3 2008, 10:57 AM

One question for everyone getting 30+ mpg.... What speed do you guys usually drive at? I have an 05 elantra gls and the last time i checked i got about 24mpg and i drive about 45 miles per day on i 95. Granted I have an average speed of 80 so that may be the reason im only geting 24 mpg.

Posted by: Stevetheriddler May 3 2008, 01:31 PM

When I average 70, I get about 36mpg in my HD. At 80 it drops to 32-33. According to my scangauge for my current tank, I am getting 35 mpg with an average speed of 35 mph.

Posted by: il06gt May 3 2008, 01:51 PM

I have had over two years now to get good numbers. Bought my 06 E GT 5 speed new. Average over 2 years is 34 mpg.

Best tank was 550 miles or 39 mpg and that was 99% highway.

Worst tank was 26 mpg and that was pulling my two rail motorcycle trailer with two dirtbikes on it.

I am HAPPY!

Posted by: Chris05e May 3 2008, 02:38 PM

I do alot of Highway and city driving that is probably why. This summer i should be doing mostly Highway so i will just calculate it again and see what happens

Posted by: Hon-Day04 May 3 2008, 08:26 PM

well I returned from my day trip today and I currently have 309miles on the tripometer with 1/4 tank left. I'm guesstimating that I wll average about 31.5mpg. This is about 95% highway...and once I'm done it will probably be 90% highway as I'll be back into city driving now. The trip consisted of 600lbs of people (3 guys--including myself) and running the AC on the way back home. I'm actually a little upset that I'm not gonna get better mileage. I drove between 70-72 MPH the best I could without having cruise. I have new tires with NITROGEN inflation, and the throttle body bypass and Easy intake mod w/ K&N panel filter. I was really hoping on getting close to 35mpg. I was definitely driving for economy and still am. Oh, And I put a bottle of Techron in when I filled up before the trip for good measure. Those with HDs seem to be getting a lot better mileage--what did hyundai do???---hon-day04

Posted by: Alex2004GT May 3 2008, 08:31 PM

Chris05e, I never saw that great of mileage with my Elantra (had a 2004 GT) I live in the suburbs, but my commute to work inlcudes a lot of stop and go with lights and stop signs.

Posted by: cclngthr May 3 2008, 08:48 PM

1. They modified the gear ratios to get better fuel mileage.
2. The HD head particularly the exhaust valve angles are slightly smaller making the engine run better in addition to the CVVT cam timing tuning revisions.

Oh, the pcm does not have the stumble the XD has. The HD is running a bit richer, but offers better mileage. I average 35 going 75+ mph. I get 40 if I'm easy on the gas.

I weighed my fully loaded HD yesterday and with me and 2 other people in it, plus my speaker box and gear, the car weighs in at 3218 pounds. Lighter than the 3549 weight of my XD GT sedan.

Posted by: RHINESEL May 3 2008, 10:58 PM

I try to keep it at 65 but the car just seems to like to be driven at 70. I noticed a definite dropoff in mileage after 75 mph.

Posted by: Chris05e May 4 2008, 01:27 PM

thanks alex. i guess 24 mpg isnt too bad but i do 80 most of the time so that could be the major contributor. Im going to try and slow down so hopefully ill notice a little bit better mileage

Posted by: Hon-Day04 May 7 2008, 07:10 PM

Ok guys...I filled up the other day and calculated my mileage from my trip......33.5!!!!!!!!!!!!!! I wish it was more but I was thinking I was only gonna get about 31 so I'm happy I guess. I went 380 something before the gas light came on...and put 11.x gallons in...calculates to 33.52 I believe. Not too shabby. this was 95% highway staying as close to 70 as I could(don't have cruise)---Hon-day04

Posted by: Hon-Day04 May 9 2008, 06:44 PM

Ok....now I'm a little concerned. The Mrs. has been driving the car....and by NO means does she drive fast. I have ONLY 122 miles for half a tank! I NORMALLY have 150 miles for half a tank! What gives? IS the EIM actually hurting my gas mileage??? I reset the ECU by pulling the fuse for 15 minutes. Please HELP!!!!!!----concerned Hon-day04

and yes I filled her ALL the way up!

Posted by: Neanderthal May 9 2008, 10:37 PM

Could be the car wants to run harder.

I too have some MPG weirdness going on.
Just did my 3rd fill up (4th tank ).
Here are my MPGs for the first three tanks:
36.6 (full tank from dealer) first fill up, not sure if this was E10 or not.
31.0 second fill up, "10% or less ethanol"
21.9 third fill up, found a station with 100% gasoline. Also tossed in jar of Lucas fuel tx.

My experiences with E10 and E15 have not been positive. My Impala dropped at least 10% MPG, and my wife's PT ran like a pig on heroin on the stuff.

On the last tank where I got 21.9 I drove it a bit more easily than the first two tanks.
Some cars like to be run and I'm wondering if this is one of them. I took it out for a mountain run, with some big hills and downshifts and WFO throttle, and the fuel needle has hardly moved in over 100 miles.

Just for chuckles I sent KIA an email. Some young girl called (guess they don't know how to use email), she was nice enough but she didn't know the difference between octane numbers and E numbers. Eh?
Basically a waste of 10 minutes of perfectly good oxygen.

I'm pretty OC tracking MPG so I'll keep a tight rein on this and see what develops.
I'm suspecting it's a combination of needing to run harder and that E10 piss I used.

Posted by: Silent Wolf May 9 2008, 11:44 PM

Any Ethenol is shit! Swear its a fuckin conspiracy to mix that shit in so we have to fill up more often. That said, I got ~27mpg on the last round. We'll see how this tank goes since i decided to fill up on base instead of Walmart.

Posted by: Hon-Day04 May 10 2008, 08:05 PM

well of course guys I'm in the dog house as the Mrs. thinks the EIM is causing us to use MORE gas. That's ridiculous I said. BUt I dunno...she may be right---hon-day04

Posted by: Silent Wolf May 10 2008, 10:27 PM

Easy Intake Mod?? If thats all, then definitely not! Its the new %10 Ethanol requirement in all gas along with the ECU reset. IIRC, it dumps more fuel so you will be running richer for a couple hundred.

Posted by: RHINESEL May 10 2008, 11:33 PM

It very well be the reset of the ECU. I don't know the technicalities but resetting it makes it forget the mapping or "learning" that it had done with you. So if you drove conservative before and it adjusted the shifting to that style of driving then you'll see worse mileage. It also affects the power the engine produces and thus more gas required.

Many reset their ECU just before racing or before getting their car dyno'd so they can post bigger numbers or get a little more power from their engines.

Wait a couple of tank cycles and let the system "relearn". Then do the calculations again.

Equus and I had a big conversation about resetting the ECU in one thread and truthfully, I still don't get it. In a little bit when I have more time to search I'll try to find it.

Posted by: Silent Wolf May 10 2008, 11:48 PM

Ya, cause if ours cars run too rich then you dont make any power.

Posted by: Hon-Day04 May 11 2008, 03:42 PM

Well I went ahead and filled up today with 167.5 miles on the tripometer and the gas guage showing a little less than half a tank. I filled up until the pump stopped on its own. Then i squeezed until the pump shut off again. Then I squeezed a little more (basicly putting one more $1.00 in from when the pump shut off on its own). So I KNOW i am completely FULL! I put in 7.265 gallons which calculates to 23.05 MPGs. Not that different than my previous tank of city driving that yielded 23.3 MPG. SO I'm not as concerned as I was...maybe my guage is just acting funny--dunno. I would like to see future tanks increasing in MPGs since I did the EIM...to at least recoop my $50 for the K&N filter! Oh well-------hon-day04

Posted by: Silent Wolf May 11 2008, 07:09 PM

You DONT want to top it off! Something about how our fuel pump works n such that it actually goes into an overflow tank on the side as waste and is slowly broken down by charcoal.

Posted by: Hon-Day04 May 11 2008, 08:14 PM

overflow tank? Never heard of such. Should I just stop when the pump shuts off on its own?--hon-day04

Posted by: winc May 11 2008, 08:30 PM

The evaporative emission system isn't so much as an overflow, but yes, overfilling your fuel tank can cause the breather to seep fuel into the charcoal canister and cause a CEL, and can be costly to fix as it would not be a warrantable issue, not the car's fault.

Posted by: Hon-Day04 May 11 2008, 09:10 PM

So, in theory, the tank is full when the pump shuts off by itself?

Warranty?...I ain't got no stinkin warranty....hehe----------Hon-day04

Posted by: winc May 11 2008, 09:21 PM

Yes and no... it's as full as you should fill it. Topping off the fuel tank on a modern car is ill-advised due to US-mandated emissions systems. Also by stopping at the first click, you have a better chance of getting a more accurate mpg calculation at each fill-up.

Posted by: Hon-Day04 May 11 2008, 09:31 PM

assuming I fill up at the SAME pump every time AND assuming that the pump hasn't lost any calibration---hon-day04

Posted by: RHINESEL May 11 2008, 11:18 PM

Silly me, it's actually a pinned topic!

Here you go.

http://www.elantraclub.com/forum/index.php?s=&showtopic=6309&view=findpost&p=72211

Darn, that wasn't it (but it does help).

Here it is, boy did I have to search!

http://www.elantraclub.com/forum/index.php?s=&showtopic=5996&view=findpost&p=67863

Posted by: Silent Wolf May 12 2008, 06:18 AM

Actually required to keep that stuff fairly accurate by law. And even between companies the stop point is fairly even, Only Murphy Oil, aka Walmart gas, has a higher thresh hold for stopping, +.5 gals more. Where i can usually get 12.5 +/- .5 gals, Walmart would usually fill to 13. These fills being from gas light on empty.

Posted by: Silent Wolf May 13 2008, 12:33 AM

Here's some food for thought:
When your school has a major engineering program your gonna get the full physics dose at times, and this thread is one of those.
http://www.ucfcarclub.com/forum2/viewtopic.php?f=2&t=2266

Posted by: Neanderthal Jun 6 2008, 11:45 PM

Just filled again, with what I believe is real gas:
Tank # Fuel MPG
1: ....gas 36.6
2: e10+gas 31.0
3: e10+gas 21.9
4: ....gas 31.9

Driving conditions similar for all tanks. Tank 4 has some AC time.

Amazing, the difference between horse piss and gasoline.

I have not done my civic duty in contacting my state legislators.
I have done my car duty in finding a real gas station.

Posted by: krellmk Jun 15 2008, 03:34 PM

Found this in Marvel Mystery oil forum...It is safe to use Marvel Mystery Oil in every tank of gasoline. In fact, we recommend that you do. Using it in every tankful helps replace the lubricity lost with the addition of ethanol to gasoline. It also improves fuel economy.

Posted by: il06gt Jun 24 2008, 11:05 PM

Sorry, but E10 gas is not causing your mileage drop. You have way too many uncontrolled variables.

At MOST you would see 1 mpg...more than likely about 6/10 of a mpg.

Gas is gas. Shell is Amoco is BP is Chevron is QT is Texaco is Exxon. They all make gas...put into a system and "cash out" of the system. It is all a marketing game and the FTC has allowed them allot of leeway to sell their wares...

A good analagy is taking a $100 bill and depositing in the bank. In a few days you go to that (or any bank) and withdraw $100 to have a night on the town with the wife. You wont get that $100 out...same for gas companies. BP is selling gas that Exxon refined and vice versa.

There are a few exceptions to the rule, but most of us are running "plain ole' gas".

Posted by: Neanderthal Jun 27 2008, 06:21 PM

If you are in the military, thank you for your service.


I'm sorry, but you are wrong. I don't know how you can categorically state that E10 is not responsible for my MPG drop.
This is the third personal car I've used E10 in, and it's had an effect on all three. About a 10% drop in one, a huge drop and significant loss of power in another.

Thanks for your opinion--not fact, opinion--but just because the oil companies or some fed bureaucracy say there's no difference doesn't make it so.
And the 100 dollar bill has nothing to do with anything.

E10 is junk gas, just my opinion based on hard data.

Posted by: MilesT Jul 9 2008, 05:43 PM

Summertime - 8.4 to 8.8 litres / 100 km.
For the past two tankfuls tried driving at 90 km/hr rather than 100. Not a significant difference.

Wintertime that's about 9~9.5 l/100k.

Cheers - Miles

Posted by: Cypher Jul 10 2008, 05:47 AM

I regularly receive 36-37mpg communting to and from work. I fill up my gas tank everytime I fill up and use my trip to keep track of the miles on the tank and my last couple fillups have been 37mpg. I've slowed down since tuesday because I'm curious if I can break into the 40s. I will let you know how I do.

Posted by: danielhsieh Jul 13 2008, 06:27 PM

On my 13th tank of gas.

Mileage from 22.39 to 28.81 with an average of 25.05 MPG

I live in LA with 40% highway, 60% city driving with A/C on 80% of times.

Posted by: bgilbert1 Jul 13 2008, 09:15 PM

My GSL with automatic gets from 26 to 31 mixed 70/30, hyway/city. It should do 33-34 on straight hyway at 70 mph.

My 5 speed Accent gets 33 to 39.

Posted by: jamhandman Aug 12 2008, 03:41 PM

Just did 341.8 miles in 9.025 gallons. About 37.87 MPG, ofcourse this was done driving the speed limit with limited A/C use and the Windows Up when driving about 50 MPH, and a light foot on the gas.

The hardest part of this is driving on the highway the speed limit. The limit is 55 and everyone else is going atleast 65, I just hate it when they see a car going slow...the speed limit...and just tailgate. I just want to have a button that drops pins or something.... hmmm... Maybe this will be my first Mod to the elantra...

Posted by: Kennys2008Elantra Aug 13 2008, 07:31 PM

I just purchased my 2008 Elantra on th 11th. I mostly drive city 10 miles one way to and another 10 back home, 5 days a week. I have the GLS what should i expect per tank if i'm driving like a grandma?

Posted by: jamhandman Aug 13 2008, 09:15 PM

If you drive with the A/C on I think you should get around 29/30...if you drive like grandma but maybe better.

Posted by: 02CanGT Sep 3 2008, 01:04 PM

Just did 1400km run there and back over longweekend. One run between fills, Brockville, ON to Grand falls, NB, after overshooting Grand Falls, and backtracking 20km. 844km, on that tank. Talk about running on empty. Had about a litre to spare
Averaged 6.3 L/100km = 38MPG US

Did 120-130kmh, but no real heavy footing it. Some 50-80kmh periods through Montreal detours late last night.

Posted by: sargeants Sep 3 2008, 01:29 PM

That's pretty awesome.

I filled up lastnight and reset everything before heading home. Started out with 24L/100km - then it dropped to 5.9L/100km by the time I got home.
Sucks that this morning I got it up to 9.2... damn morning rush hour.

Posted by: mikelantra25 Sep 4 2008, 07:02 AM

I get poor gas mileage - I'd hate to do the math to see how bad it really is, but I'd guess I get around 23 - 26mpg. I'll do the math the next tank. It just shows how much city driving (and only city driving) affects gas mileage.

Posted by: webber555 Oct 19 2008, 08:55 PM

I just ran my first near full tank - stop start peak hour, short city trips, a/c on about half of the time, even dragged an old v8 HZ Holden at a set of traffic lights (and beat it lol!), and it's an auto.

Consumption was 9.88L/100km (just under 24mpg) - is this close to normal? My gf is taking a highway drive on Friday - will fill it up before she goes and hopefully will see some better figures.

Posted by: wenlez Nov 8 2008, 09:54 PM

when i first bought this 2002 Elantra GT, the ODO reads 18.9MPG. now i did a tune up, changed the spark plugs, wires, and air filter, but i get worse MPG. Only 18.1MPG. i really want to find out why.

Posted by: mntwins Feb 10 2009, 08:23 PM

I have to drive 70 miles every day for my job. Mostly highway, some stops along the way though. I think I get around 29 or so including the town driving I do. I'm happy with that, I get paid for my mileage so anyway I can squeeze a few more MPG's out of the car is literally MONEY IN MY POCKET!

Posted by: mankyle Feb 11 2009, 10:38 AM

My 2004 GT was averaging around 27 for the last 2.5 months since I bought it. I just replaced plugs (they were toast!) wires and installed K&N. On the new tank of gas I have been sitting around 30 mpg with a mix of highway and city driving. On the highway going 60 mph I was able to get around 40 mpg and even hit 42 on a downhill stretch. Of course this was right after fillup and reseting the mpg calculator so I am sure the average will be much lower but was cool to see.

Posted by: Spectre Feb 11 2009, 11:05 AM

My average has been at about 23 mpg city driving only. I did get nearly 25 with only city driving once. That particular tank I was driving to get the best gas mileage possible. Coasting down hill, coasting to lights when they were red, making my auto shift at about 3k rpm by letting my foot off of the accelerator. I'd shift at about 2.5k when the engine wasn't warmed up yet. That particular tank I ended up getting about 24.8. I don't have any idea of what my high way mileage is though.

Posted by: 02elantragt Feb 28 2009, 10:17 PM

at my lowest i get 28 mpg n thats city... n the highest so far has been 36 i have an '02 elantra gt.BTW its a 5 speed. n i think its due for a new air cleaner soon.. i might wait n save up n get the K&N apollo intake. but on average i get 33-35 highway n 28-32 city n my cpu shows only a few tenths diff then calculating it.. actually the other day the cpu was lowballin it.. it showed that i got 2 more mpg than wut the cpu showed by calculating it... hmm oh well its soo much better than the 15mpg highway i got wit my ol chevy. so far so good. i love my lil hyundai.

Posted by: Pryme Mar 17 2009, 11:59 PM

Gas mileage sure seems to very, and it is due to driving style.

A lot of people think they are driving in a manner to get good mileage when in reality, if they rode with someone who actually does get good mileage(not even talking hypermiler) they would say, wow you drive slow haha.

I have gotten a best of 40.7mpg all freeway, that was over 250 miles, on a road trip. 2 people and things in the car, a/c was used about half the trip. and we were going 60-65.

I always get around 31mpg around town, with about 90-95% city.

But I drive in a way my auto shifts around 2100-2300 rpm. and I make sure im in the top gear when I am cruising, even if I have to back off the throtle to force a upshift.
I also coast as much as possible to stop lights(saves brakes as well) and brake gentley as well.

acceration is the killer. and abrupt stabs at the gas. if your tach is moving quick, ever, you are not doing as well as you could.

My car has 7500 miles now. got the 40.7 when it had about 4,000 miles.

Posted by: jamhandman Mar 18 2009, 07:47 AM

I have the HD and just got 36 MPG on a tank. The HD automatic is very good on gas is driven nicely. When I do strictly highway with this car is get over 40 MPG. When I do highway I do not go above 63 MPH, after that point the RPM climbs to high for my taste. I like the keep the engine between 1600 and 2300 RPM when driving. Good luck to others if they are also attempting to save fuel.

Posted by: pedalkicker Mar 20 2009, 05:56 PM

2002 Elantra with 110,000 miles, I'm getting 29.9mpg 65% city 35% highway, try to keep rpms low, but every once 'n while got to let her rip!

Posted by: cobas Mar 21 2009, 11:29 PM

Just went on a DC - Pittsburgh roadtrip. On the way up I drove about 60-65mph and just briefly got stuck in traffic: 32.4mpg x 250mi. On the way back down I was doing 80-85mph and got 28.5mpg x 250mi but it was about an hour shorter and more fun
Also, this is with the 'performance' 215/45R17 Kumho Ecsta ASX's at 37/35psi.
I seem to remember getting 35-37mpg on the stock tires when the car was new... oh well.

Posted by: juice Mar 23 2009, 10:22 AM

2003 Elantra automatic GT....
I first want to issue a suggestion to anyone discussing MPG...
I hear so often people describing their mileage as "I only fill up every other week", or "I drive 375 miles before I have to fill up".
Those statements have very little to do with MPG. (sorry if I sound like a grouch, but these types of things kill me).
Anyway, the ONLY way to calculate miles per gallon is to fill your gas tank, write down the mileage or reset the trip odometer, drive the car, fill it up and then divide the miles driven by the amount of gallons used. Even this is not 100% accurate, but if you do it regularly and chart the results, you'll get a fairly accurate measure of the actual gas mileage.

That said,
my mileage varies between 24 city and 32 highway (pretty much what is listed in car reviews).
I have noticed that when filling up with gas that claims up to 10% ethanol, I get about 10% less MPG.
I try my best to pass by gas stations that use ethanol for that very reason.

Posted by: Pryme Mar 23 2009, 12:00 PM

How do you tell about the ethanol content? I know they are supposed to post it on the pump but never see a station without it here in MN, and never did in CA when I lived out there.

MN is the ethanol capitol though so maybe thats it haha.

Posted by: Neanderthal Mar 23 2009, 09:44 PM

Since my last post was in June 08, I'll update.

I track every tank. In fact, I set up a line chart on graph paper just for ducks and to satisfy my latent OC gene.

I've gotten 28.2 MPG since winter started. It started officially for me during the blizzard of 17 December.
My overall MPG since buying the car is 30.5.

Posted by: pedalkicker Mar 26 2009, 09:27 AM

Ok, more lead foot, now down to 27.5mpg but that's still fine with me. Way better than my piece of sh!t dodge truck I got rid of last fall.

Posted by: Bobzilla Mar 26 2009, 10:15 AM

Car picked up. Winter was hovering around 29.9-31.1. Last few tanks have pushed back up into the 32-34 range. 104k, still beat it like a red headed stepchild.

Posted by: TMac Mar 26 2009, 08:08 PM

I get low 20MPG, do to it's all city. 1/2 of a mile is the long I go with out stoping for a red light. 320 miles for the tank. 420 miles is the best (D.T.E) the trip told me.

Posted by: 02elantragt Mar 26 2009, 10:21 PM

my worst is 27 my best is 36 i almost never get below 32 n i never run below 70 highway n the motor got 60 k n 167k on the car shes still goin strong n gettin great gas mileage

Posted by: Thrasher May 14 2009, 10:50 AM

On my 2-week old 2009 Elantra I get pretty poor gas mileage. I get about 23 MPG or 10 l / 100 km. But it's probably because of the fact I drive rush hour traffic just about every day. Is this normal? I am a little bit disappointed as my old 1990 Pontiac Sunbird had similar gas mileage (I was buying half a tank of gas every week, same as with Elantra). Can I expect my mileage to improve after my engine gets properly broken in?

Posted by: RHINESEL May 14 2009, 06:18 PM

City mileage in the Elantra is really different than highway mileage. 23 in city like conditions is pretty normal. The wide open highway is where these cars shine.

Posted by: IHeartMyRedCar May 16 2009, 08:12 PM

i drive a fair amount of highway and bumper to bumper traffic. I get 30-31 in my HD. I got 35 mpg when i went to north carolina last summer.

Posted by: Thrasher May 25 2009, 11:02 AM

I filled up today and calculated my fuel economy. I got 8.4L/100km or 29.4 MPG for mostly city driving, but there was one shorter highway trip involved as well. Not bad but from the specs I should be getting 8.2L for pure city driving so I'm not impressed yet. My car is still brand new though.

Posted by: R.C. Jun 17 2009, 08:25 PM

My Elantra is a year old now and just a tad over 20,000km. I get 5.6L/100KM or 42 MPG on the highway with me and one passenger, a full tank of gas, a loaded trunk with luggage and food for a week, no A/C and CC set to 100km/h.

In the city I get 8L/100km or 29MPG, all city driving mixed with mostly non-rush driving and some rush hour driving traffic.

Posted by: cobas Jun 18 2009, 08:37 AM

I've managed to keep the running average above 26.5mpg for two full tanks now, with mostly commuting 10 miles to work. Either I calmed down (maybe a little) or the CarPC was really working the alternator (doubt it) or the fuel mixture changed for summer, because I was getting 24mpg before. '03 manual 98,000mi. That reminds me the NGK Iridium spark plugs have around 60k on them now... oh well.

Posted by: Traxiz Jun 22 2009, 09:48 PM

In my 2007 GLS auto I typically get between 27-29 mpg with about 70% highway and 30% city. I have a very light foot and generally do 65mph on the highway, also I very rarely use my A/C.

I've always thought these mpg numbers were kind of on the low side but maybe it is because I live in San Diego and there are a decent amount of hills.

Posted by: Vex Jul 2 2009, 09:51 PM

Well, I just drove home from Ohio today. I have an 09 Elantra GLS, auto trans. The drive was 450 miles (roughly). I filled up once and got an avg. mpg of 32. Now this was driving mostly uphill, with luggage, two people, and driving at around 85 for 90% of the trip. I'm very pleased. On the drive to Ohio from my home I got 39 mpg, with only one person (me), about 90 lbs. of luggage, and some nice long downhill areas (gotta love neutral!). So far the car only has about 2200 miles on it. It runs very smooth, no issues, suspension seems perty good too. I will be going back to Ohio on sunday, July 5th, with that second passanger and our luggage. I'll see what I can get again. Then next weekend, I will be driving yet again back to PA from Ohio, only this time I'll be alone. So, I'll keep you guys posted on the mileage. I will be giving the car it's first oil change tomorrow....going from "break-in" oil to full sythetic.

Posted by: milehighhyundai Jul 3 2009, 12:34 PM

Just did fill up #2 on my new 09 SE. Tank #1=32.2, Tank #2=31.7. City/highway about a 70/30 mix. A/c blasting almost all the time. I'm a happy camper so far!

Posted by: jamhandman Jul 15 2009, 02:07 PM

Just changed oil and air filter, using Mobile 1 5w20 with stock filters, I did a drive to south New Jersey, to work a week and back and forth to Long Island. About 414 Miles, 10.5 Gallons of gas used.

Would of been higher, but Long Island traffic was bad, mostly not moving for 2.5 hours.

I really think the Automatic HD is great on gas. It better be considering the acceleration....kind of reminds me of how a hybrid drives.

Posted by: 02elantragt Jul 15 2009, 08:20 PM

The car seeing as its an automatic would most likely not save you any mileage by putting it in neutral. Also it's safer to just leave it in drive. You have more control in case of a split second wreck or something.

Posted by: STVA Jul 15 2009, 09:16 PM

My highway mileage is well into the 30s, but my city mileage sucks, it is in the low 20s. My car is a manual, I drive like a granny most of the time, and my tires are always inflated properly.

Posted by: jamhandman Jul 16 2009, 11:37 AM

I have my tires at 38 PSI. When going down hills I think you save more gass if you put the car in gear or even in a lower gear, 3rd or 2nd.

Posted by: WillPartHyundai Aug 8 2009, 07:11 PM

^^^ +1
On top of everything else, this type of driving on an automatic kills the transmission clutch packs slowly but surely.

Posted by: twofer Aug 16 2009, 11:30 PM

Friday, I drove from Clearwater, FL to Boca Raton, FL and achieved 29 MPG which was a mix of city / highway. I filled up in yesterday for the ride home. I used 3/4 of a tank to get home so I'll calculate mileage at my next fill up.

Posted by: MdElantra Aug 16 2009, 11:41 PM

29 seems a little weak, with the 2006 Elantra hatch manual i pullled 35-39 in 180
+mile trips at 65mph average yet 20-24 in the city and im Maryland so differnt conditions. Your car is new though id expect that highway milage to increase unless you travel at 80mph +. Im sure that beats the mileage on your "clunker" trade in though enjoy the saving you got a great buy.

Posted by: twofer Aug 17 2009, 12:07 AM

actually, I was moving between 70 - 80 MPH the whole time I was on the highway. You are right, I certainly got better mileage than I would have in the '91 Lincoln.

I enjoyed every mile of my trip. The Elantra handled well and gave a smooth ride.

Posted by: Bobzilla Aug 17 2009, 08:07 AM

^ Ican attest, there is somethign about FL gas that is terrible. I've noticed this on our last 4 trips down. 3 in the Elantra and one in the truck. LAst trip with the Elatnra we averaged 35-36mpg at 70-75mph(indicated, 73-79mph real speed) from Indy to Byron (last fill up), but the 2 tanks we filled up in FL were 31.xx and 32.xx doing the same speeds. Once we refilled in GA we shot back up into the 34-36 range again for the entire trip home.

The truck was the same. We go 23.x on two tanks down, then got 19.9 (not even 20) on our one tank there and shot back up to 23.x on the way home with gas outside of FL. I don't know if it's a higher ethanol mixture, or cleaners package or what. But your gas sucks!

Back on topic, I've been running A/C a lot and runnign the car HARD lately. She dropped down to 32.9.

Posted by: sarge Aug 17 2009, 12:46 PM

over my little mini-vacation I racked up over 1200kms (750miles) and got an average of 6.9L/100km (34mpg)
Then I started towing a trailer, and got to deal with the cottage return traffic with furniture loaded in and was getting 7.9L/100km (29mpg). Now this is all based off the little trip computer - the carpc feature hasn't been fully tweaked right yet.

I've got a bit of maintenance to do soon: plugs, wires, tire balance and will also do a tranny flush - so will have to see how things fair after that.

Posted by: underider Nov 1 2009, 10:32 PM

My new '09 gls stick got 44 highway driving home from the dealership. I filled up with plus and that tank lasted more than a month where my in-town mileage was 36 (obviously I haven't been doing a lot of driving). Today I put in a tank of regular unleaded and I'll see how I do with that and my new tires with 44 psi front and 37 psi rear.

Posted by: blue05gls Nov 6 2009, 03:53 PM

I wish I was getting 300 to a tank... darn engine mods, and no bank 1 o2 sensor.. I really need to put that back in

Posted by: Bobzilla Nov 6 2009, 04:16 PM

You ONLY have a bank 1 sensor. Now whether it's B1S1, or S2 is another story!

consistently back to 32mpg. Stupid wintermix.

Posted by: Silentwolf Nov 6 2009, 07:58 PM

I'd like to have the stuff some people are on when they report over 40mpg on our cars.

Posted by: ROC4GT Nov 13 2009, 08:13 AM

Lifetime mileage is 30.6 miles per gallon, mostly on 87 octane with a minimum 10% ethanol.
Last fill up was 31.8 (last couple of tanks have been 91 octane with no ethanol).

80% highway with a daily commute of 62 miles round-trip and I usually drive 70 mph.

Posted by: blmqzjc Nov 29 2009, 10:42 PM

Hi Bob,

It's not the FL gas - it's the terrain. Contrary to most people's beliefs, you dont get the best gas mileage on flat terrain (like FL). It is much better in gently rolling hills (like north GA, TN, KY, NC, VA, PA, etc.). I used to live in Atlanta and make countless trips both north and south, in many different vehicles. Didnt matter if I was in a Lincoln or a Corolla, if I was travelling north the mpg was always better than when heading south to FL. Once you get off the piedmont in GA (below Macon), my gas mileage would begin a slow, steady decline.

Now that I live in FL, and do most of my driving on rural highways, I find the gas mileage to be quite acceptable. My wife just drove the Elantra to West Palm Beach and back (about 450 miles), and I tacked on another 60+ today, all on the same tank of gas. Total was 512 miles, the computer read 39.1 mpg for the tank, with 30 miles remaining. It took 13.2 gallons to refill the tank at the same station and pump I filled it with before her trip. Calculated manually, that's about 38.78 mpg, which is close enough to the Elantra's computer readout of 39.1 for "gubment" work. I think this is the first 500+ mile tank I have ever gotten on the Elantra. In fairness, my wife said she drove about 65 mph most of the trip to WPB.

When living in Atlanta, I made several trips to Indy and always got 37 mpg or better as long as I kept it under 75 mph. The Elantra is an impressive little car.

BTW, I've been using nothing but Chevron 87 octane in the Elantra for months, and Havoline 5w30 conventional oil, which seems to be a good combination for me.



I can put my Elantra on cruise control at 45mph on rural backroads her in FL and get 40mpg all day long.

Posted by: rang Dec 3 2009, 08:10 PM

Coming back from Campo/Boulevard area East of San Diego...staying at 68mph I got 47 mpg on the freeway. Blew me away.

That wasn't relying on the dash based mpg calculater. That was full tank (patiently topping off for about 5 minutes...so to the brim with some spillage) at the Golden Acorn Casino...then some off road dirt road to a ranch and then home on the freeway to Costco and doing the subsequent math.

My wife drives an '09 Prius...which I love...but a bragged a bit about this since this is a straight gasser.

Well I bought this car to off set my lifted 02 Excursion 4by V10...which sits untill I use it off road or to tow a 29 foot trailer.

This little puppy allows me to afford gas for the X.

Posted by: JustaFan Dec 8 2009, 09:35 AM

Mileage fluctuates between 32 & 36 per gallon & 370 & 420 per tank. Depends on traffic & the weight of my right foot.

Posted by: spawn again Dec 12 2009, 10:21 PM

Too lazy to convert but I get about 8.5Liters per 100Km.

Posted by: burris Dec 18 2009, 10:50 AM

My 2010 Elantra GLS(auto) is about 6 weeks old and has about 700 miles. I live in South Fl.

The first tank gave me 28 miles on basically city driving. No fancy stops and starts.

The last 3 tanks dropped down to 22 mpg. Really bad. Took car to dealer for a check...proceeded to tell me not to believe the manufacturers claims of mileage...? Reason we got this very model was due to renting a 2009 in N.Y. 3 months ago and mileage there was 28mpg avg. Dealer said they checked it and that's the best it will get.
Shortly I will call Hyundai and see what they have to say..

Posted by: sarge Dec 18 2009, 03:08 PM

Check what Bob has to say about Florida gas on the previous page
That may be most of your problem

Posted by: 02elantragt Dec 18 2009, 08:20 PM

The highest I've gotten lately is like 28.8 mpg. It's because of school. I drive 70 miles down on a fresh tank then I go 2 miles 4 times a day and I run it kinda hard. also my last tank was absolutely disgusting I don't know if I'm going to want to even see it. It didn't help that my e-brake stuck a few times and what not.. I'm also going to regap my spark plugs when I do all of my other stuff and make sure they're firing alright.

Posted by: burris Jan 4 2010, 01:32 PM

==================

To continue from my last post, I was able to do another test.
I went up to Palm Beach(High Way)..about 100 mi rt (I'm a speed limit driver)...and did the rest of 216 miles in city driving. City driving for me translates to 35-45 mph and my green ECO light never goes out, if indeed it has any value at all.
I then filled the tank with the very same gas and this time I got 25mpg in the mix. To me this is not at all satisfactory. Hyundai is waiting for me to call them back to follow up on my previous call. They suggested I try another dealer, which I will do in a few days.
My wife drives a 2006 is250 Lexus with about 11,000 miles on it. She averages maybe 8-12 city miles rt when she does and reliably gets 20-21 mpg. Same gas same State of Florida.
Tires are inflated correctly, etc.

Any suggestions appreciated.

Posted by: Shadowhawk Jan 5 2010, 01:08 PM

Well sense I'm the only Alaskan here I will have to say that my gas blows donkey nuts up here. In the wintertime I get an av. of around 22 in city, and in summer I get about 23. BUT then again I'm only 20 and LOVE to leave my foot on the floor Totally my fault..

I remember tho when I tried to lay off the gas which was REALLY hard.. (like a cocaine addict trying not to shoot up) I filled'er up with 4$ gas and went about 60-65 all over Anchorage and I got closer to 30. But ever sense I've had this car, I've always stayed low 20's but like I said it's mostly my fault

Posted by: Bobzilla Jan 5 2010, 01:45 PM

between the winter mix and the few extra minutes of warmup time I seem to be stuck around 29.9. At least that's been the last 3 tanks.

Posted by: Shadowhawk Jan 5 2010, 01:59 PM

Oh forgot warmup time lol... Then my mileage is a bit lower then I think.

Posted by: Bobzilla Jan 5 2010, 02:22 PM

highs this week are in the teens, so the car is really cold.

Posted by: Shadowhawk Jan 5 2010, 02:31 PM

When I hopped off the plane the sunday after my vacation. It was around 16 degrees in Anchorage. Today is low 20s. For some reason we are getting a warm front hitting us. Normally we are around -2 to -20 ish.

Posted by: milehighhyundai Mar 17 2010, 10:11 PM

My little HD has been rockin' lately! I changed jobs in early Feb and now commute ~35 miles each way with 80% highway (60-80mph). My last few tanks running on winter blend and winter tires I am averaging 35 mpg! My best tank so far is 36.6. This car rocks for efficient and fun commuting each day...

I'll update next month after I swap the winters back to my 17's.

Posted by: 02elantragt Mar 18 2010, 05:06 PM

Lately my mpg's have been about 27-28. Which really isn't too bad. My oil has 7k on it, my air filter is absolutely filthy, and I have my winter tires on. So I'd have to say thats pretty good. I run a half mile trip like 4 times a day because of school and about a 70 mile trip to and from on the weekend. I miss seeing my 35mpg I got in the summer before school.

Posted by: shuriken Mar 18 2010, 08:22 PM

38mpg freeway - worn out tires.

37mpg freeway with new tires.

Posted by: NevynPA Mar 19 2010, 07:27 AM

I don't know if those are actuals or from the trip computer, but there are some reasons for that. Your new tires are thicker, having more tread. They make fewer revolutions per mile because of this, so your car sees it as less distance traveled.

Another thing is that if the new tires you bought have a higher Crr (Coefficient of Rolling Resistance), it takes more energy just to push the tire down the road, thus sucking up some precious MPG.

I just got my new tires put on as of Wednesday. I only bought 2, as the others are still in great shape. I was very careful to get LRR tires (low rolling resistance) as my primary concern with this car is mileage, not power. Already I can see about a 2.5 MPG increase, and the car will coast further than before. There's not much improvement in the mornings when it's cold out, but in the afternoon when it's 60-70 degrees my ScanGaugeII is showing 44 MPG for my commute home as opposed to 36-38 MPG before they were replaced.

Lifetime Fuel Economy: 32.14
90-day Fuel Economy: 32.14
3-tank Fuel Economy: 32.14
EPA Rating (% over): 24 (33.9167%)
Total fills: 3
Average cost per gallon: $2.30
Average cost per fill: $28.07
Average cost per mile: $0.07
Total gallons used: 36.6
Total miles traveled: 1176.2
Total cost: $84.17
Total saved: 12.41 gallons
Total saved: $28.54
Average tank distance: 392.07



So far, I've had 3 tanks of gas in the car.



If you want to keep watching and see the full conditions/notes on each tank, click on the image/link in my signature. I'm our resident MPG-aholic.

Posted by: Stevetheriddler Mar 19 2010, 05:20 PM

I am confused now. Normally I get 31mpg driving down to San Diego from my parents' house. Today I average about 5 mph faster going 75 to 80 most the way and averaged 36. WTF??? Drafting?

Posted by: only1db Mar 21 2010, 07:18 AM

maybe...less braking and more constant speed?


i know since i moved i'm not filling up nearly as much, but since its been around town it went from 29-30mpg to 26...which isnt bad and i usually will fill up like twice a week...but now its 1 every week and half...and my wifes car she only filledu p once in the last 3 weeks! the amount i'm saving in gas now its rediculous!

Posted by: NevynPA Mar 22 2010, 08:43 AM

Possible. Does your car have CVVT? It may be helping too. I just (like as in 5 mins ago) had to do a HSR (high speed run) home and back to work to drop off a car seat for my wife. I was running 65-70 instead of my normal 55-60, and got better mileage (38 compared to 34). I think it's because once you get it up over 2500 RPM, the CVVT eases back into an "eco" configuration.

http://www.hmaservice.com/viewer/content.asp?uid=NevynPA&sid=958228986&vehicletype=PASSENGER&mfrcode=HY&area=HMA&langcode=ENG&group=SHOP&modelid=XD13&modelyr=2005&mmctype=en&mmcid=25&keyword=cvvt&sitinfolist=13^1350^13500400^none^301^1^ENG^HY^XD13^2005^en^25^none^none^none^shop^0$&cat1=ELANTRA(XD)+%26gt;+2005+%26gt;+ENGINE+%26gt;+Engine+Control&firstnodedesc=Emission+Control+System+%26gt;+Exhaust+Emission+Control+System+%26gt;+CVVT+(Continuously+Variable+Valve+Timing)+System+%26gt;+Description+and+Operation+%26gt;+Description

Posted by: Stevetheriddler Mar 22 2010, 10:19 AM

that's not it. When I say 75-80 I'm referring to my actual speed, which is 80-85 indicated or about 3500-3700 RPM for those of you without the manual gearbox. As for braking, I normally do the trip at about 77 indicated and I always use the cruise since it's not a high traffic route the times I use it. In my previous experience the Beta in my HD guzzles the gas once it goes above 77 indicated.

Posted by: NevynPA Mar 22 2010, 10:41 AM

Well, then I've got nothing. B)

Posted by: fsv87 Mar 22 2010, 01:59 PM

When I drive from Miami, FL to Gainesville, FL (336 miles) I can get up to 420 miles per tank. I do a rough calculation because I don't have a trip computer, but I usually get a figure around 32 MPG. This is while doing 80 mph. I have been very impressed with the gas mileage this car gets. It's a 2001 that just turned over 79000 miles, and it has no signs of stopping.

Posted by: NevynPA Mar 25 2010, 07:18 AM

Rolled over 500 miles on my current tank this morning. I'll fill it on Friday and let you know how it came out.

Posted by: fsv87 Mar 25 2010, 09:52 AM

That's great...is it modded, or is that totally stock going 500 miles/tank?

Posted by: NevynPA Mar 25 2010, 10:35 AM

At the moment, the only mod I have is the grille (upper) is blocked off with some LDPE foam (like pool noodle foam). This prevents some airflow into the engine, allowing it to warm up to operating temp faster. It will possibly come out with warmer weather. I don't drive hard, so I may not need to pull it out. Even on the small hills around here, my max coolant temp reads at 191 F, and the fan never comes on.

I have a ScanGaugeII that I use to monitor my MPG as I drive, as well as other things, such as throttle position and ignition timing (and more, like water temp, air intake temp, engine load, etc.). It plugs in via OBDII port to get all this info, and also will read and clear DTCs.

I have tires that are designed to be more energy efficient, which also help me achieve MPG figures above average. Mostly, though, it's by adjusting the nut behind the wheel. B)

I'm getting 25-27 around town, 35-40 highway, and on "middle roads" (35-55 posted speeds) I can maintain 40-45 MPG.

After I get some mods on the car, I should be able to boost it by 3-6 MPG, with no loss in power.

ScanGaugeII:


Current Tank (notice no low fuel light on yet!)


Grill Block:



Full set available at http://www.flickr.com/photos/8420678@N08/sets/72157623691399312/

Posted by: silet Mar 25 2010, 12:09 PM

Interesting gadget the ScanGauge II. I check it out yesterday and I should have looked at it when I got my scanner last fall.

Posted by: NevynPA Mar 25 2010, 12:46 PM

It is. I bought mine used for $100. If you sign up at http://ecomodder.com or at http://cleanmpg.com, you can get them for $149.95, and a portion of the price goes to benefit the site. Retail is $159 or $169, I forget.

Posted by: 02elantragt Mar 25 2010, 07:19 PM

Is your fuel tank the standard 12gal?(I think). I mean I think the best I have ever gotten from a tank of fuel was like 480 or something like that. That was going by the cars stock cpu which most likely is off. I tend to never let my car go below a 1/4 tank.

Posted by: NevynPA Mar 25 2010, 08:24 PM

My manual says it's 14.5 gallons. I filled up tonight, because we took our daughter(s) to an easter egg hunt at a nearby mall.

Gallons: 14.672
Miles: 522.5
MPG: 35.612

Again, I stuff the tank up the filler neck so that I always know just how full the tank is. Some pumps may click off at different points, so you end up with a margin of error between 1 and 5% (or more!) when calculating MPG. Filling to the neck helps to eliminate this variable. It also helps when getting the extra miles out of a tank.

I just enjoy the added distance out of a tank. It's the help of the ScanGaugeII and paying attention to everything around me while driving (road, following distance, lights, elevation, etc.) that gets me the numbers.

I think I'm doing pretty well for only getting in at the beginning of February.

Posted by: 02elantragt Mar 26 2010, 06:06 PM

I'll have to look in my manual sometime, but I know mine isn't 14.5. Maybe because mine is a gt?

Posted by: Stevetheriddler Mar 26 2010, 07:42 PM

HD is 14.5.

Posted by: 02elantragt Mar 26 2010, 07:50 PM

His signature says '04 elantra. So he has an xd-2. Did the xd's have a smaller tank?

Posted by: fsv87 Mar 27 2010, 12:28 AM

The XD has a 14.5 gallon tank.

Posted by: NevynPA Mar 29 2010, 07:14 AM

Yep, I have an XD2. I don't have pics of it now, but I'm already halfway through this tank. 254 miles on since fillup, my ScanGaugeII is saying 279 miles to empty, and my "guess gauge" on the dash is showing around 5/8 tank remaining. Tank average at the moment reads at 36.8 MPG.

Posted by: zero10 Mar 29 2010, 09:37 AM

In my 2010 Elantra Touring 5 speed I am getting ~7.7L/100km with 100% city driving which I think is 30-31mpg. It is not all stop and go traffic, but for the most part I am travelling 11km and stopping every 2-5 blocks, although I do get 3 chances to bring it up to 5th gear for about 2km each time. For a car with under 1000km on it I am very happy especially considering it is rated 8.9L/100km city. I was given a loaner for a week with the automatic transmission wouldn't do any better than 9.7L/100km on the same route, boy am I glad I didn't spend the extra $1400 getting an automatic.

Posted by: NevynPA Apr 5 2010, 10:55 AM

Fillup. 509.9 miles on 14.057 gallons for 36.274 MPG.