[MD/UD] Fuel Economy [Archive] - Hyundai Elantra Forum

: [MD/UD] Fuel Economy



salvorhardin
01-19-2011, 01:20 AM
Decided to start a thread so 2011 elantra owners can post their fuel economy. So far hoping for better mileage as the engine breaks in. I've averaged a little better than my '05 elantra. I drive about 90% highway-10% city.

2011 Elantra Limited Automatic:


actual MPG display MPG Odo. Miles avg mph gallons
28.68 29.5 437
32.72 33.0 653
32.44 33.0 868
30.15 30.9 1131 42
32.06 27.9 1370 51
30.66 31.0 1600 46
30.97 31.0 2300 44 22.627

silvergls
01-19-2011, 01:43 AM
I should have kept track of my stats like you did. I'll start doing it the next time I do a fill, but I do remember it being somewhat correct. So far this is what I got.
29mpg
34mpg
33mpg
These were taken by account of the tank register and mileage calculation.

Drives are about 40% highway and 60% city. Temp average 76 F

STWater
01-25-2011, 10:02 PM
Im in the process of keeping track of my gas mileage and misc. problems on my 2011 Elantra for JD Power (1 of 100 people selected). So far my average is about 30 mpg and im up to 4500 miles on the car and on my 16th fill. I'll scan the copy of my progress and post it when I get a chance.

watts916
03-06-2011, 04:17 PM
You guys are getting great mileage. I have 497 miles and have filled up 3 times since picking up the car with a full tank of gas. That is a whopping 13.8 miles per gallon.

While it is all "city" driving, my 5,400lb. 2005 VW Phaeton with a 4.2L engine does much better.

dougert
03-14-2011, 07:55 PM
Here's a breakdown of my last 5 fuel-ups:

actual mpg display mpg avg mph
27.5 28.4 33
28.2 28.9 32
30.4 30.4 35
30.4 30.3 37
32.5 33.2 44

You can see where I changed how I was driving to work (I used to drive the non-highway roads. Now I just drive the highway). I also just crossed the 3000 mile mark over the weekend as well.

Ugzz
03-15-2011, 09:58 AM
good job keeping track, seeing some nice numbers. im lovin these 2011s more and more.

with gas prices so high i end up putting like a few gallons in when im low and the only station nearby is super expensive. then i go fill up at a cheaper place.
so its too annoying to try and track, course in my 5 year old ride i know its been going downhill and i really just dont want to know anyway lol

SuperGLS
03-15-2011, 10:28 AM
I'd like to see some figures from someone who drives 80-90% highway driving.


You guys are getting great mileage. I have 497 miles and have filled up 3 times since picking up the car with a full tank of gas. That is a whopping 13.8 miles per gallon.

Something is wrong here. Seriously wrong.



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Ugzz
03-15-2011, 10:29 AM
I'd like to see some figures from someone who drives 80-90% highway driving.

Something is wrong here. Seriously wrong.

somehow i missed that first time around, yeah though.
you need to go back to the dealer with this info.. like now

dougert
03-15-2011, 12:25 PM
I'd like to see some figures from someone who drives 80-90% highway driving.

Since I adjusted my commute, I'm now doing about 90% highway driving, that's also evenly split between 55 and 65 speed limits as well.

mcstar
04-03-2011, 07:59 PM
Wow, I'm glad I got the manual transmission. I've only had it a week now, so I'm not even through the first tank of gas. The night I drove it home from the dealer when it only had 7 miles on it, I got 34.7 on the heads up display. That was about 90% highway driving at 75 mph.

Then I got to talking to one of my buddies that has hyper-miled over 300,000 miles and he gave me some pointers. Basically, always shift before 2000 rpm and drive like a grandma.

Well, last night I drove about 40 miles on Farm to Market roads averaging 55 mph. On a flat and straight stretch of 12 miles it held 67.5mpg! Of course as soon as I hit hills and stop signs the average went down quite a bit. It averaged out to about 47.5mpg with 30% stop and go city traffic for the entire 40 mile trip. I will be interesting to see the actual tank mpg after my first fill-up.

Another tip, reset the MPG gauge while cruising at a fixed speed and take note of the mpg. For the first 10 miles or so it will be very sensitive since it has a small number of values to average. Now, drop the cruise down by 5-10 mph and note the new mileage. With a MT at a fixed speed, mpg will be strongly tied to speed/rpm minus losses from wind and road conditions. ATs are a little less strongly correlated due to torque converter losses.

Most of the time you can pick your mpg by picking a fixed speed. Faster = < mpg :)

JTH1018
04-06-2011, 03:57 PM
When I filled mine up the other day for the first time my display showed I was at 27.1 avg mpg, but since the dealer filled the tank when I got it, I'm not sure if they had reset everything so my ODO was at 261.2 and it took 10.147 gallons so I figured roughly 25.74 avg mpg. I've put about 50 all city miles on it since I filled it up myself and averaged about 25 mph (according to the display) and here's what i got....

https://www.elantraxd.com/forums/attachment.php?attachmentid=15433&d=1302119191

SuperGLS
04-06-2011, 05:25 PM
I've never found anything but a full tank of gas to be a good representation of real life fuel economy. That's probably just me though. MPT is what I like to hear about.



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NPMountaineer
04-07-2011, 10:24 AM
I'm still on my 1st tank, but I'm at 33.2 which has probably been 80/20 highway/city. I have the auto tranny.

UrbanerMezei
04-07-2011, 11:06 AM
If you guys cut your speed down from 75 to 70 mph you'd notice a lot of difference. I found with my 07 M/T that if I kept the RPM around 3000 to 3200 the gas millage was great, any higher and you might as well drop a match in your gas tank.

hyunelan2
04-07-2011, 11:25 AM
Rule of 5:

For every 5mph over 60mph, you lose 5% fuel economy.

40mpg @ 60... 38mpg @ 65... 36.1 @ 70, and so-on.

(This is due to increased wind causing more power to be needed to overcome wind resistance).

UrbanerMezei
04-07-2011, 11:54 AM
As a rule of thumb I set my cruise at about 110 km/h 70 mph anything else becomes suicidal with the drivers up here.

NPMountaineer
04-08-2011, 07:21 AM
Filled up last night. 1st tank avg 34.8.

Reset it and made a 30 minute run of interstate going home and got 46.9 mpg! This was in hilly areas going between 60 and 80 mph.

dougert
04-08-2011, 09:51 PM
If you guys cut your speed down from 75 to 70 mph you'd notice a lot of difference. I found with my 07 M/T that if I kept the RPM around 3000 to 3200 the gas millage was great, any higher and you might as well drop a match in your gas tank.

I've been keeping my speed to between 65-70mph, and noticed that the "sweet spot" for rpms is around 1800. If I keep them to close to there, I average close to 38mpg according to the display.


I've never found anything but a full tank of gas to be a good representation of real life fuel economy. That's probably just me though. MPT is what I like to hear about.

For my last tank, I broke the 400 mile mark. I drove 400.1 miles, and filled up with 10.3 gallons, for an average mpg of 38.8!
My drives have been about 95% highway driving.

Pete03GLS
04-08-2011, 10:04 PM
u cant physically do 65-70 n keep ur tach at 1800. unless u were making 2 separate statements about that. 65-70 is around 3,000rpm's. in my 03 elantra anyways...

unless the 2011 has ridiculously long gears... then it is possible and nevermind.

as a matter of fact... does anybody know if theres a longer 5th gear i can swap into my transmission? 03 elantra. let me know i want a longer 5th gear.

NPMountaineer
04-09-2011, 03:43 PM
u cant physically do 65-70 n keep ur tach at 1800. unless u were making 2 separate statements about that. 65-70 is around 3,000rpm's. in my 03 elantra anyways...

unless the 2011 has ridiculously long gears... then it is possible and nevermind.

as a matter of fact... does anybody know if theres a longer 5th gear i can swap into my transmission? 03 elantra. let me know i want a longer 5th gear.

I ran it at 65 mph today on a flat stretch and it was at 2100 rpm. This is in the auto. The manual may be able to go lower.

Pete03GLS
04-09-2011, 07:24 PM
other way around. automatic gears are SUPERRRR long. i maxed out my 03 automatic, at 110, in 3rd gear. thats retarded long gearing. and it still had about 500rpms to go before redline.

manual gears are much MUCH shorter in comparison. which means, higher rpm's at the same speeds as an automatic.

hyunelan2
04-10-2011, 08:29 AM
u cant physically do 65-70 n keep ur tach at 1800. unless u were making 2 separate statements about that. 65-70 is around 3,000rpm's. in my 03 elantra anyways...

unless the 2011 has ridiculously long gears... then it is possible and nevermind.

as a matter of fact... does anybody know if theres a longer 5th gear i can swap into my transmission? 03 elantra. let me know i want a longer 5th gear.


You are forgetting the 2011s have a 5AT, whereas the older Elantras only had a 4AT. They are geared similar to a 5MT now, as far as ratios go. They are all also geared to have a really wide 5th gear (relatively) so that your RPMs are lower at highway speeds.

only1db
04-10-2011, 09:51 AM
you guys are taking this quite seriously...

NPMountaineer
04-10-2011, 10:18 PM
You are forgetting the 2011s have a 5AT, whereas the older Elantras only had a 4AT. They are geared similar to a 5MT now, as far as ratios go. They are all also geared to have a really wide 5th gear (relatively) so that your RPMs are lower at highway speeds.

The 2011 has a 6 speed automatic. The final gear ratio's are 3.065 on the Auto and 4.333 on the Manual.

I reset the mph readout, ran a 5 mile flat straight stretch at 50 mph today, and got 61.7 avg mpg!

Forgot to mention on the 5 mile run at 50 I was at 1700 rpm.

clark1566
04-20-2011, 01:40 PM
Posting my first actual mpg figures. I usually fill up on the weekend and drive all week with about a 50/50 split of city/highway. When I filled up last weekend I had used 8.89 gallons of gas and gone 261 miles. Actual mileage 29.35 mpg. Granted I am really settling in to the car and driving a little more aggressisvely than I normally would. Kinda hard not to since it's so much fun to drive!

NPMountaineer
04-20-2011, 02:04 PM
Posting my first actual mpg figures. I usually fill up on the weekend and drive all week with about a 50/50 split of city/highway. When I filled up last weekend I had used 8.89 gallons of gas and gone 261 miles. Actual mileage 29.35 mpg. Granted I am really settling in to the car and driving a little more aggressisvely than I normally would. Kinda hard not to since it's so much fun to drive!
I filled up last night for the second time. I got 33.6 mpg compared to 34.8 on the first tank. For the next couple of tanks, I'll probably be more agressive. I've been pretty easy on it so far because of the breakin period (2000-4000 rpm).

So far I like everything about this car!

TerpsRacingJS
05-20-2011, 07:45 AM
I've had my '11 Elantra Limited for about 3 weeks now; my commute for work is about 95 miles/day (back & forth); 90% highway. This is on I-95 (at ~5 am and ~2 pm) so my speeds are constantly 65-75, or more depending on the flow of traffic at the time. I also drive around 100 miles on the weekends that are about 50% highway/city, maybe slightly more towards city.

The numbers below are off the top of my head, but should be within 1-2 mpg of what they actually were.

Tank, Readout MPG, Actual MPG
1 35 31.5
2 38 34.5
3 40 37
4 37 36.5
5 40 38

The difference between the readout seems to be getting smaller as I drive more miles.

Edit: Auto Trans

NPMountaineer
06-07-2011, 12:33 PM
Those are some good starting mpg numbers, Terps.

I've also seen about a 2 mpg difference between the readout and the actual mpg.

I am at about 3000 miles and have noticed that the mpg is slowly improving. I did a 30 mile trip on a 4 lane divided highway (avg 55 mph) and got 48.5 on the way down in a head wind and got 52.3 on the way back with the wind. That's the best I've done so far!

dvdpck
06-27-2011, 07:40 PM
500mi on first tank.Filled up with 11.5 gals which is 43.47.I have standard trans and do some hypermiling.I have a 80 mile round trip for work with 20 miles of heavy stop lights.

rosedoodle
07-26-2011, 09:42 PM
After a month with the GLS MT, 2100 miles and 6+ fuel-ups, I'm averaging just under 35MPG, including about 80-85% 65-70MPH highway commute. I got about 2/3 through a tank with mostly a different highway, never going over 60 and got 39.2MPG. And the engine isn't finished breaking in yet. These are not avg. mpg readings, but actual mileage, all flat Florida terrain. Thankfully rural and not city, where the numbers would surely sink. Can't complain! One of these days I'm going to fill up with at least 11 gal. non-ethanol just to see how much better that is.

thedude
07-27-2011, 08:34 AM
The last 2 months my mpg has been 31-34 with about 60% city driving. My actual and the numbers on the display are always different with the display typically showing 2mpg high. I'm pleased with the numbers but working on various techniques to improve.

Matrixloader
07-28-2011, 01:49 AM
on your 2011 at 60-65 mph with 90% freeway driving you will see 40mpg.

best tank i gotten on my 01 was 37mpg at 70-75mph with 99% hwy driving for 5hrs

Shaffas2012
10-09-2011, 09:00 AM
With close to 6000 mi on my 2012, if I do straight hwy I get 40 plus, mixed daily with 70 % hwy is pretyy consistant at 35. I used the cruise control a lot, use the Torque app on my Droid X daily to finer tune my foot. Added a short ram intake which made no difference in MPG but it sounds better, I think a CAI would add some low end torque, and looking at a dual exhaust which I know will help with low end torque. All I can say is it's a fantastic car, and being 56 yo I have been playing around with cars for a few years LOL, so I know a good solid car when I drive one.

SuperGLS
10-09-2011, 07:43 PM
Thanks for the update Shaffas. Good to hear it's regularly getting 35MPG. I think that's great.



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