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Old 10-30-2011, 09:09 PM   #1
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17/21 mpg?

Does anyone with a jk 12 really get that? My average is 16 according to the dash and I don't speed and drive 50/50 city/ highway. Is something wrong or does a new engine use more gas?

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Old 10-30-2011, 09:12 PM   #2
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Is it still in the break-in period?

If not, did you properly break it in?

Here's a link to an ongoing, and long, gas mileage thread:

2012 Gas Mileage - let's get some real world numbers!

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Old 10-30-2011, 09:13 PM   #3
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Oh, and welcome to WF.
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Old 10-30-2011, 09:19 PM   #4
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Thanks buddy, yeah I got 250 miles so I guess it's still "breaking in" this is my first new car so I didn't know the rules about it I just been following the manual
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Old 10-30-2011, 09:39 PM   #5
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If I recall correctly from the thread I sent you the link to, the initial mileage pretty much sucks. It gets better as the break-in progresses.

That thread's been running awhile, so there's probably some good info in there for maximizing mileage, if that's what you're looking for.

Let's face it, a Jeep's never gonna give a Prius a run in the mileage dept. But you can't take the roof and doors off a Prius and drive into the woods, either.
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Old 10-30-2011, 10:13 PM   #6
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In my opinion, only the excessively geriatric get the good gas mileage -- and even then, only on Sunday mornings when not driving against the wind direction.

I just traded in a 2010 Camaro which was supposed to get 19/26 and rarely did I get above 12 (unless I was driving like a granny) and most of the time stayed at 11. With the Rubicon that I got this week, it's hovering around 15 or 16. Window sticker mpg numbers, I think, are there for looks.
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Old 10-30-2011, 10:25 PM   #7
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Definitely some padding there.

Still, w/the Wrangler, you should get more than 16 after the break-in.

Till you add tires, etc.

Then you're SOL.
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Old 10-31-2011, 12:44 AM   #8
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If I recall correctly from the thread I sent you the link to, the initial mileage pretty much sucks. It gets better as the break-in progresses.

That thread's been running awhile, so there's probably some good info in there for maximizing mileage, if that's what you're looking for.

Let's face it, a Jeep's never gonna give a Prius a run in the mileage dept. But you can't take the roof and doors off a Prius and drive into the woods, either.
Very true lmao!
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Old 10-31-2011, 03:13 PM   #9
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I average about 20.5 mpg overall in DC metro traffic. Not sure what you're doing or how you're driving it but the vehicle is quite capable of pulling much better averages than what they advertise. Learn to drive for gas mileage if it worries you.
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Old 10-31-2011, 03:59 PM   #10
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Talking Yea!

Around town, average 17.7 on the road I have seen 21.7 @ 60-mph
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Old 10-31-2011, 04:28 PM   #11
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Originally Posted by kbryant88 View Post
Does anyone with a jk 12 really get that? My average is 16 according to the dash and I don't speed and drive 50/50 city/ highway. Is something wrong or does a new engine use more gas?
You are doing great. And, don't expect any real change after "break-in".
There always seems to be a lot of people living in denial about mileage figures, see: anyone claiming to get 20mpg in city driving in a Wrangler.
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Old 10-31-2011, 05:22 PM   #12
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I'm getting about 1 MPH less or about 16/20 on a 2012 Rubi with 4.10/ 6 speed with 285/70/17 tires. The 1 MPH drop was essentially due to the tires.
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Old 10-31-2011, 07:22 PM   #13
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I've been averaging 17 to 18 in mixed driving. Currently have 1700 miles on it. I'm sure the 2 doors and JKU's with 3:24's and 3:73's are doing a little better, but I'm skeptical of any number over 22 mpg.
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Old 10-31-2011, 08:00 PM   #14
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A little over 15 mpg (15.27 last calculation) with 3.73, 33's (speedo recalibrated with Procal) and mostly rural driving (not much stop and go). I'm a fairly conservative driver as well. I only drive about 8k miles a year so it doesn't really bother me.
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Old 10-31-2011, 09:44 PM   #15
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On Sunday, I was getting 26mpg driving at 100kph/2000rpm.

But then again - ITS A DIESEL!!!!!
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Old 10-31-2011, 10:19 PM   #16
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Thanks for the feedback!
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Old 10-31-2011, 11:24 PM   #17
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You are doing great. And, don't expect any real change after "break-in".
There always seems to be a lot of people living in denial about mileage figures, see: anyone claiming to get 20mpg in city driving in a Wrangler.

I'm with you -- I just don't see how it's possible to get 20mpg in the city....then again, I'm not a conservative driver. To me, driving is an adventure to be savored
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Old 10-31-2011, 11:29 PM   #18
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I've been getting 22 w/manual although I've been TDY for 2 weeks so I'm getting like a million miles to the gallon!
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Old 10-31-2011, 11:30 PM   #19
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roughly 1100 miles on my 2012 JKU Rubicon with 4:10 gears and I'm getting 16 around town and 18 on the highway if I am lucky. Nowhere near the 20 mark and I don't think I will ever see it.
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Old 10-31-2011, 11:31 PM   #20
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roughly 1100 miles on my 2012 JKU Rubicon with 4:10 gears and I'm getting 16 around town and 18 on the highway if I am lucky. Nowhere near the 20 mark and I don't think I will ever see it.
*exactly* the same here... 16/18 seems to be my norm so far, but I'm only at 850 miles
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Old 10-31-2011, 11:41 PM   #21
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On Sunday, I was getting 26mpg driving at 100kph/2000rpm.

But then again - ITS A DIESEL!!!!!
I'm having a serious case of Aussie envy. A diesel in a Jeep...How sweet is that!

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Old 11-01-2011, 06:13 AM   #22
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This tank I'm only getting 19.3mpg so far but I'm pretty sure that is due to the kid who put my new wheels and tires on going for a dealer test drive to make sure the TPMS activated correctly and that there were no drivability issues after the wheel balance. That and I did a lot more stop and go trips on this tank than I did last time. I'm still pretty stoked that I'm getting that much yet alone over 20 like last time.
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Old 11-01-2011, 12:43 PM   #23
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Also, depending on where you live, your area couldve already switched over to winter gas. If thats the case, expect ~10% drop as well
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Old 11-01-2011, 12:52 PM   #24
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I think we actually get better mileage in town than we do on the highway. We're averaging about 18 on the display and calculated, but if we drive a long time on the highway it drops to about 16. Around town the display hovers around 19-19.5.
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Old 11-01-2011, 04:07 PM   #25
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I think we actually get better mileage in town than we do on the highway. We're averaging about 18 on the display and calculated, but if we drive a long time on the highway it drops to about 16. Around town the display hovers around 19-19.5.
I kind of noticed this too. I noticed a big drop off in mpg on the dash display when at 70+ mpg on the highway. Peak mpg seems to be right around 60 mph on mine.
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Old 11-01-2011, 04:10 PM   #26
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*exactly* the same here... 16/18 seems to be my norm so far, but I'm only at 850 miles
+2.
I'm also getting about 16/18. From what I've read across the threads this is pretty typical for the 2012's.

(I'm at 1,400 miles, Jeep build in signature.)
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Old 11-01-2011, 04:41 PM   #27
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I kind of noticed this too. I noticed a big drop off in mpg on the dash display when at 70+ mpg on the highway. Peak mpg seems to be right around 60 mph on mine.
I've noticed this from the mileage thread.

The difference seems to be between 50 and 70 mph. All three axle ratios have similar "around town" numbers.....but that is probably due to how one takes off from lights, how long you sit at lights and other factors.

All three axle ratios drop off of a cliff above 70......due to drag I'm assuming. But the difference between the three seems to be how efficient they handle "highway miles". I'm guess the new engine is producing enough power at 1700-2000 RPM's to maintain its speed on a fairly level highway.
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Old 11-01-2011, 04:49 PM   #28
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I thought it was due to my new Gobi rack but just took a 900 mile trip mostly interstate going around 80 and my mpg dropped way down to barely 16mpg. This is in a manual Rubicon with the 4.10 gears. Interesting to see others with a similar experience.
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Old 11-01-2011, 05:12 PM   #29
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I thought it was due to my new Gobi rack but just took a 900 mile trip mostly interstate going around 80 and my mpg dropped way down to barely 16mpg. This is in a manual Rubicon with the 4.10 gears. Interesting to see others with a similar experience.
Nah...
Your Wrangler has the aerodynamics of a deep freezer.... Even without the rack...you were going to get horrible mpg at that speed... With 4.10's, you must have been turning over 2700 rpm's (on stock wheels).
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Old 11-01-2011, 07:06 PM   #30
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On Sunday, I was getting 26mpg driving at 100kph/2000rpm.

But then again - ITS A DIESEL!!!!!

That's what I'm talking about! Just out of curiousity, from a monetary perspective, how much is one gallon (U.S. equivalent) of diesel fuel in Australia?

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