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Old 06-04-2012, 05:57 PM   #691
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2012 2dr/Auto/3.21 After 4000 miles with a average MPG of 22

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Old 06-04-2012, 06:04 PM   #692
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Quote:
Originally Posted by Jpatrick
2012 2dr/Auto/3.21 After 4000 miles with a average MPG of 22


I have a 2012 Rubicon with 4.10 gear. . And I am getting 17 in the city. I have 10,000 miles on her . That's pretty good considering I was getting 15 mpg when I had 2000 miles on it.

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Old 06-07-2012, 03:07 PM   #693
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Horrible at best! During break in I babyed my stock JEEP and I got 16.5 MPG Hand calculated, after break in period I drove it like I stole it and I got 16 MPG!! no matter what I did I wouldn't get more than 16.5MPG. all of this based on 50/50 City/highway, mostly spirited driving.

After 33s, steel bumpers front and back and sprint booster, I'm getting ~14 MPG hand calculated and dropping as we speak.

Last 3 tanks:
14.3
14.0
13.0

2012 JK Sahara 2DR Auto 3.73 Mileage 3200 wondering why I'm getting crappy MPG while other reporting much higher numbers, fuel quality? or am I missing something?

Where I live, fuel is relatively cheep (compared to the US) but still it's just ridiculous, feel really bad for you guys paying high gas prices!

on a positive note, the smiles per gallon are through the roof, and I wouldn't trade the JEEP for anything else!
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Old 06-07-2012, 03:14 PM   #694
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2012 JK Sahara 2DR/Auto/3.21...seeing 17-18 city/22-23 highway. Average 60/40 city/highway and generally see 18-19 MPG per tank.
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Old 06-07-2012, 03:20 PM   #695
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Oh, and that's with about 4,400 miles on the engine...
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Old 06-07-2012, 03:56 PM   #696
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2012/4 door/sport/6 speed/3.73 limited slip/32" tires/3500 miles/bought new 4/21/12

24.7 = best tank
23.5 mpg 80% highway @ 64mph + ac + flat ground and no wind
19.3 mpg = worst tank (80%+ city)

I shift my 6 speed at 2,000 rpm most of the time and accelerate moderately.

These engines are capable of power or efficiency at any given time but not necessarily both. It's laws of physics -- energy in must = energy out.

Also wind resistance is a huge factor in any vehicle. Once you start getting over 65mph you drastically reduce your economy. I rented a Focus once and got 28mpg doing 75 mph. Another instance my Ford pickup was driving into 40mph winds and it cut my fuel economy by 25%.

Happy Jeeping!
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Old 06-07-2012, 04:00 PM   #697
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I have a JKU Sport Stock, auto trans, hard top, 3.73/LSD and I average 18mpg all city. I have 1500 miles on it.

My friend has the same spec Jeep with soft top and half doors and gets 12mpg, not sure what accounts for the difference.
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Old 06-07-2012, 04:03 PM   #698
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I have a 2dr Rubicon with a 6 speed and get 17-18mpg in town and 19-20mpg on the highway
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Old 06-07-2012, 06:07 PM   #699
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I drove from Washington to California last night and today. I stayed about in the 18.5 - 19.5 mpg range drivivg mostly 65 - 70 mph. I was surprised how little difference in mpg there was in flat vs mountainous terrain. Maybe 1 mpg difference according to the computer. I didn't do any hand calculations. On a side note, the 6% downhill grade that is encountered for several miles required much less braking than I have had to do in other vehicles. I consider that a plus as I don't like to ride my brakes too much. The one small negative is that it tends to lean a little bit on the curves, but I expected that. A little adjustment in driving habits is all that is necessary. All in all, about what I expected, and I like it. I could drive this thing anywhere.

2012 Sahara. Auto. 3.73. All hardtops on. Part rainy/ part dry conditions. No towing. No cargo on top. No AC. Windows up or slightly cracked. Cruise Control on most of the time. Carrying approx 500 ibs. of people, dogs and gear.
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Old 06-07-2012, 06:35 PM   #700
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Quote:
Originally Posted by Jakesdad View Post
... The one small negative is that it tends to lean a little bit on the curves, but I expected that. ...
The lean on curves might be a function of your springs. I have a very stiff ride with surprisingly little lean in my JKU with 18/59 springs.

If you have lighter springs, you might be able to get rid of a lot of that roll with a simple, inexpensive spring swap.
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Old 06-07-2012, 09:48 PM   #701
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The lean on curves might be a function of your springs. I have a very stiff ride with surprisingly little lean in my JKU with 18/59 springs.

If you have lighter springs, you might be able to get rid of a lot of that roll with a simple, inexpensive spring swap.
Thanks, I think this is something I'm just going to live with. It's not a huge deal and I'm otherwise happy with the ride and handling. I haven't towed anything yet, though. Do you think towing would compound the problem, lessen it, or no difference? If stiffer springs helped with towing as well, I might go for it.
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Old 06-07-2012, 09:55 PM   #702
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Thanks, I think this is something I'm just going to live with. It's not a huge deal and I'm otherwise happy with the ride and handling. I haven't towed anything yet, though. Do you think towing would compound the problem, lessen it, or no difference? If stiffer springs helped with towing as well, I might go for it.
First things first. Check the tags on your springs and see what you have now. Then you'll know if 19/60s will make a big difference or not.

The part number on the tag will end with two letters such as AA or AC, you want the two numbers before that.
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Old 06-07-2012, 10:07 PM   #703
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Quote:
Originally Posted by Up Hill Bill

The lean on curves might be a function of your springs. I have a very stiff ride with surprisingly little lean in my JKU with 18/59 springs.

If you have lighter springs, you might be able to get rid of a lot of that roll with a simple, inexpensive spring swap.
That would be more your shocks.

I have the adjustable Rancho's w/ stiffer TF springs.

Set my shocks to 0. Soft but leans and bounces like crazy.
9, I lose my fillings rofl

5 is perfect, no body roll and 0 bounce

If you have sport shocks might want to look into the gas shocks offered in the rubi /upgraded package.
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Old 06-07-2012, 10:26 PM   #704
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'12 JKU, 1800 miles. Trip to Vegas and back, averaged 23.1 on the freeway between 70 and 75. Wife has been averaging around 19.9 city driving to and from work.
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Old 06-07-2012, 10:39 PM   #705
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That would be more your shocks.


If you have sport shocks might want to look into the gas shocks offered in the rubi /upgraded package.
He has a Sahara. Don't they have the same shocks as Rubi for 2012? I really don't know, that's not a rhetorical question.
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Old 06-07-2012, 10:41 PM   #706
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He has a Sahara. Don't they have the same shocks as Rubi for 2012? I really don't know, that's not a rhetorical question.
I believe they do.
But in the 2012 Chrysler Media guides, one had heavy duty, and the other had performance (or something like that). Still...I think they are the same.
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Old 06-07-2012, 10:42 PM   #707
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Quote:
Originally Posted by Up Hill Bill

He has a Sahara. Don't they have the same shocks as Rubi for 2012? I really don't know, that's not a rhetorical question.
Yep I believe so. Scratch that idea
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Old 06-07-2012, 10:47 PM   #708
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Quote:
Originally Posted by panthermark

I believe they do.
But in the 2012 Chrysler Media guides, one had heavy duty, and the other had performance (or something like that). Still...I think they are the same.
Interesting.

Better shocks will lessen body roll.
There was a big difference between my Stock rubis and Bilsteins.
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Old 06-07-2012, 10:54 PM   #709
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I guess I better report in on my gas mileage after I totally derailed this thread. Sorry...


With about 4750 miles on the odo, I have an overall average of 16.73 MPG, spreadsheet calculated.

That's with the CA required 10% ethanol and very hilly country road and town driving with a little highway here and there.
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Old 06-08-2012, 12:00 AM   #710
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Originally Posted by nwsportsguy View Post
2012 JK Sahara 2DR/Auto/3.21...seeing 17-18 city/22-23 highway. Average 60/40 city/highway and generally see 18-19 MPG per tank.
Pretty much exactly what I'm getting. Same Jeep but a Sport with 1900 miles.
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Old 06-08-2012, 06:36 AM   #711
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OK, here's an update on my gas mileage.

2012 JK Sport S two door, soft top, six speed manual, 3.21 gearing

I have about 3100 miles on the Jeep now and have manually calculated mileage for EVERY fill-up since I took delivery.

19.05 19.71 21.08 21.41 19.20 21.65 21.16 19.83 22.25 20.13 20.20

The overall average is 20.58.

Most of my miles are on rural two lane roads driving 55 to 65 MPH.

Tomster
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Old 06-08-2012, 08:17 PM   #712
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I have a 2012 JKU 6 speed tow package with 15k miles and on the lass fillip I got 21.3 MPG
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Old 06-09-2012, 12:18 AM   #713
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Combined country/city driving for us, mostly 45-55 mph.
Sahara/auto/3.21/GY Silent Armor 32" = 21-22 mpg
Rubi/6spd/4.10/DC Crushers 33" = 18-19 mpg
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Old 06-09-2012, 12:23 AM   #714
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I have a new Rubicon Unlimited in 6-speed. (with 4.10's and stock tires) Been getting 18-19 MPG on the freeway cruising at 110Kmph (68mph) The milage is in the 3000's.
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Old 06-09-2012, 12:35 AM   #715
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11-12mpgs

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Old 06-09-2012, 12:27 PM   #716
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Holy crap thats a cool picture!! ^^^

2012 JKU
Break in varied a lot...it freaks you out initially thinking "I better not get 13 mpg forever!"

I'm getting 17 mpg now and I've got 750 miles total on the jeep. If I hop onto the freeway and settle in it goes up, average city is about 17 tho.
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Old 06-10-2012, 10:36 PM   #717
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Quote:
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One week old JKU, stock.

First fill-up: 12,48 L/100kms (18.85 mpg)
2nd fill-up: 12,23L/100kms (19.23 mpg)
3rd fill-up: 12,20L/100kms (19.28 mpg)

Not too bad for the first 1500 kms. These are mostly "hilly" highway kms, not much coasting.

I'm hoping to see a bit better once the engine is "broken-in", but I'm not at all disappointed. I love my green machine.

I can't wait to go off road! Unfortunately, not many trails for Jeeps around here.
Follow up

In town, I obviously use more gas.
15.17L/100kms (15,51mpg)
Then mostly highway
11.35L/100kms (20.72mpg)
11.70L/100kms (20.10mpg)
10.10L/100kms (23.29mpg)

Very happy with that! Average for the first 3363kms is 12.18L/100kms (19.31mpg).
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Old 06-11-2012, 10:31 AM   #718
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Update on my prior mpg post.

I have added 33x12.5x15s and a TF leveling kit. Spent Sunday running around on mountain trails around Williams, AZ. Around 50% trail driving (averaging around 12 to 15 mph) and the rest at highway speeds between 55 and 70mph. Hand calculated mpg was 18.0. 2012 Sport, 3.73 with a 6 spd manual.

Cheers,

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Old 06-12-2012, 10:45 AM   #719
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I just hit 1700 miles.
Had the JK 4dr Sahara AT about a month & have found a bit of variability in the mileage but the average seems to be 20.5 to 21.

I live at 7600 feet & the office is at about 5000 feet so the mpg display shows the difference in coming and going. I drive about 58 miles round trip to the office daily about 35 of which is highway.

That mpg gauge reminds me of the old Donkey Kong. "How high can you get?" I keep trying to beat my high score!

Now the fun part that NOBODY here is going to believe: My high score is 60.2 mpg. No s#$t.

Going down the mountain to a nearby trail at 6200 feet msl roughly 8 miles from the house, downhill all the way, 50 - 60 mph (dont tell BernCo Sherriff since the limit is around 40 - 45). I was able to keep the rpms at 1100 the whole time & I assume the VVT kicked in (or rather out). Yes this is only the instantaneous mpg & it was reset at the top of the hill but hey, who would have thought a rolling brick would be more efficient than a prius under any circumstances?

Granted the average went down to 12 after the wheeling but Mario was having fun anyway!
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Old 06-12-2012, 05:01 PM   #720
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22 highway with the 3.23 2012 wrangler unlimited, turns about 2100rpm at 70 mph. Very pleased

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