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Old 08-02-2012, 10:26 PM   #1
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Gas Mileage Help!

I just bought a '12 Rubicon with the 3.6 & run stock tires/wheels, etc. The gas mileage isn't terrible, but I would love to get better. What is the best value for improving my MPG assuming I can only afford one upgrade?

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Old 08-02-2012, 10:28 PM   #2
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Old 08-02-2012, 10:31 PM   #3
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Just curious...what is yours w/ the '12?

I just bought a stock '07, logged the first few trips at: 17.5, 16.5 & 16.
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Old 08-03-2012, 07:43 AM   #4
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I have an 07 JK with 34x 12.5 MT's. I get around 15 on average and about 17 on the highway. I have a K&N filter that does help about 2 mpg. will cost you about $45 for the filter at the parts store
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Old 08-03-2012, 08:54 AM   #5
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My Sport S in stock form is currently averaging 19.5 overall. My last tank was 19.8. That's a mix of city and highway driving with the A/C on. These things get AWESOME gas mileage considering what they are. I'm honestly pretty surprised. The only Jeep I have EVER owned that got mileage better than this was my '05 KJ diesel.

The only real difference in yours is a little more weight and mud tires. So maybe you're driving it too hard.
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Old 08-03-2012, 10:04 AM   #6
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I have a 2012 Rubicon with 5 speed auto and through the first 3800 miles I'm averaging around 16.5 in a mix of highway city. Even though that might not sound too bad I have yet to do any better than 18.0 on the highway. Usually I can get very close to EPA estimates if I put my mind to it. I was hoping for a little better highway mileage. It's not my daily driver so I'm not too concerned about it.
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Old 08-03-2012, 10:48 AM   #7
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My stock 07 is giving me 19.5
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Old 08-03-2012, 10:50 AM   #8
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I have been getting 22.1 on highway with my 12 JKU sport
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Old 08-03-2012, 10:55 AM   #9
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Sounds like the weight, deep gearing, and mud tires are killing the Rubicon mileage numbers. If you wanna' play, you gotta' pay. My Sport S takes me down any trail I want to go on, and can break 20 MPGs mixed driving easily if I keep the A/C off so I'm pretty happy with it. I think geography matters too.
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Old 08-03-2012, 11:48 AM   #10
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I just got back from a 3400 mile trip in my 2012 Sahara automatic with a BDS 3" lift and 35" Terra Grapplers. It was a mix of interstate, 2 lane state roads, city, mountain roads, some dirt and gravel and I wasn't necessarily trying to drive econimically. A/C was on almost the entire trip. I averaged 18.4 mpg for the whole trip which I was pretty happy with. I got 19.5 or better for a couple of tanks that were all highway.
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Old 08-03-2012, 11:56 AM   #11
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JPR,

what are you getting for mileage? is it within the specs on the window sticker when you bought the jeep, or is it way low. 2012 jku with 33x12.5 duratracs getting 19.5 on average
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Old 08-03-2012, 11:58 AM   #12
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Old 08-03-2012, 12:12 PM   #13
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Old 08-03-2012, 01:13 PM   #14
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Remember that you won't get your best mileage until 10,000 miles AND if you livening a location where the EPA has mandated 10% ethanol, you will never get the rated mileage. I have found that the ethanol cuts my mileage by about the same percentage - 10%. I always try to fill up outside the EPA attainment area. How can you tell if you have the 10% ethanol mandate? Easy - if the gasoline nozzle has a vapor return system, you usually are in the 10% ethanol area.
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Old 08-04-2012, 07:35 AM   #15
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According to the computer, I'm averaging right at 15 mpg. I live in a metro area with traffic, interstate, etc. Not to mention, with the heat being 212, I've been running the crap out of my AC! I think you're right about the gearing, tires, etc making a difference. I think I'll start with the K&N filter & just add here & there as time goes on. I will say however, I'm in love with the 3.6!! I can actually pass cars! lol
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Old 08-04-2012, 07:56 AM   #16
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I have a 12 rubicon 4 dr with about 2k miles on it and it has been getting between 19 and 20 mpg with town and highway driving mixed.
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Old 08-04-2012, 11:02 AM   #17
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2012 Rubicon Milage

Just checked milage yesterday and got 17.8 mpg up from 16.5 and all city driving. I am pretty happy with this and the trend seems to be up. It is pretty much what I expected. I am so glad I bought this jeep and would recommend the Rubicon.
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Old 08-04-2012, 12:23 PM   #18
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Quote:
Originally Posted by jprscottmb View Post
According to the computer, I'm averaging right at 15 mpg.
The computer lies....you are probably getting less . I have a 2012 Rubi 6 speed, stock. When my computer says i get 19, i normally get 17-18, when it says 20 its normally less, although i have had it read 20 and get over 21. best to do it with pen and paper.
i get anywhere from 17-21 and it all depends on how i drive. if i keep it between 55-60 i get 20+ mpg, but thats hard to do. if i drive 65-70 or above, it sucks exponentially.

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Old 08-04-2012, 01:01 PM   #19
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I just leave my jeep parked all day. It gets great mileage this way.
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Old 08-04-2012, 01:21 PM   #20
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i believe that improving the air intake makes a slight difference in gas mileage... I drive mostly highway (60-70mph) to work so I've been getting 22.4mpg in the first couple weeks of owning my '12 Sahara (according to the computer). I recently replaced the stock air filter with a drop in K&N, and i'm up to 23.5mpg according to the computer. Probably any high flow filter will yield similar results.
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Old 08-04-2012, 01:29 PM   #21
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No air filter will yield better fuel economy.




































yep I said it.
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Old 08-04-2012, 01:48 PM   #22
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^^^ just saying it doesn't make it true

$40 is no large investment, and since you're not replacing/cleaning it again for 50,000 miles, it works out to the same as buying replaceable ones. i think the OP should give it a try and let us know
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Old 08-04-2012, 01:52 PM   #23
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The only way to improve MPG is to remove "BOTH" drivelines.(period)
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Old 08-04-2012, 02:04 PM   #24
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12 JKU Sport S 6-Speed w/3.73 axle, i'm averaging around 17.5mpg according to the computer, but i'm in close to 90% stop and go traffic. Red light, speed up to 40-50, slow back down and do it again. Lots of short trips. I found on the highway I'm getting around 20.

Not bad at all considering the vehicle.. I was expecting it to be closer to my 06 TJ which got around 12mpg if I was lucky.
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Old 08-04-2012, 03:33 PM   #25
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2011 jku-r mpg

Just took a trip from Tucson to Sedona in my stock '11 JKU-R with the soft top on. It was me, wife and 3 kids and a few bags. With the a/c on and driving a steady 75, I got 19.7 mpg. I have 3,700 miles on the clock.

I get 33 mpg hwy in my 2010 work Taurus but no one waves at me.
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Old 08-05-2012, 12:41 PM   #26
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14-16 (mostly around town). 2" in the front, 1 in the rear, auto w/4.10 and always 100lbs of junk in the trunk.

It pulls strong most of the time ;~)>
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Old 07-17-2013, 03:08 PM   #27
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I have a 08 jku that has a K&N and magnaflow bullet that goes straight out the drivers side, 2 1/2 inch. I get 23.6 to 24 on the highway.
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Old 07-17-2013, 03:21 PM   #28
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The Rubicon is the worst setup of all for fuel mileage. Heavy and deeper gears. One thing you can always do is reduce weight. If you dont use the rear seat take it out. That is 70 lbs. Unless you are going off road remove the spare. That is approximately 65 lbs. Many vehicles dont even come with a spare anymore. I carry slime inflator and a 12v pump. Not towing? Remove the trailer hitch if you have one. Its a 10 minute job. Another 15 lbs. Weight cost mileage.
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Old 07-17-2013, 03:28 PM   #29
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There's not a huge difference in cost from an overall average 17-18mpg in a Wrangler to an overall average 26mpg in, say, a Hyundai Sonata. Some eco cars have owners complaining too and I'd bet the whole issue itself is mostly do to having lead feet.
To wit: How is your 2011-2012 Sonatas Gas Mileage? - Hyundai Forums : Hyundai Forum

If you drive 15,000 miles/year and average 17mpg in your Wrangler, you're only spending ~$23/week more for the pleasure of driving your Wrangler vs driving a boring, bland, average 26mpg econo sedan. Some of us average 19mpg overall making it equivalent to a couple bucks per day difference --- I'll skip a daily Starbucks to enjoy the Wrangler over driving a Hyundai. Perspective, folks. Perspective. Factor in the depreciation advantage of the Wrangler and it's a better than even game, IMHO.
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Old 07-17-2013, 05:24 PM   #30
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If there were some magic "get great gas mileage mod" it probably would include it from the dealership. you are driving a box with tires that stick out past the body attached to 2 axles with a lot of spinning metal in between. its like asking for a prius that drives great in the mud

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