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Old 12-17-2012, 05:18 PM   #1
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Gas Mileage

My new JKU just hit 3,000 miles and I've noticed a pretty significant drop in mpg lately ( started at about 2,000). I changed the oil at 2700 miles and am driving the exact same way and distance as I was before. FYI .. I was getting around 17-18 mpg for the first 2,000 and now I'm getting 14.5 to 15. Any ideas?

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Old 12-17-2012, 05:21 PM   #2
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Where do you live? Maybe the winter blend gas and are you warming up your jeep longer in the winter? Also check your tire air pressure it does drop with temperatures.

If none of those items have your dealer take a look.

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Old 12-17-2012, 05:26 PM   #3
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Buying a Jeep wrangler and even using the words gas mileage is just wrong. No one buys a wrangler for the mileage. I have 7000 miles on mine and the days I get 15mpg are the good days.
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Old 12-17-2012, 05:32 PM   #4
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I live in PA and don't warm the Jeep up at all and the pressure in the tires is go to go. I guess it could be the blend.

I did buy the Jeep knowing the mpg wouldn't be great or even good but I just don't understand why I would be dropping 2 mpg without any Mods. I mean if I would have been getting 15 mpg from the beginning I wouldn't be questioning it.
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Old 12-17-2012, 05:41 PM   #5
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Old 12-17-2012, 05:44 PM   #6
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Quote:
Originally Posted by mcgee10 View Post
Buying a Jeep wrangler and even using the words gas mileage is just wrong. No one buys a wrangler for the mileage. I have 7000 miles on mine and the days I get 15mpg are the good days.
Ridiculous. Maybe gas mileage is irrelevant to you, but it is perfectly reasonable to consider when purchasing a vehicle. I considered a gas Super Cab F350 instead of my JK, and one of the big reasons I went with the Jeep is gas mileage since I take a lot of long trips. A JK with 32's has about the same ground clearance as an F350 with 35's and gets MUCH better gas mileage.

Yes, one should not expect fantastic mileage out of a Wrangler, but it does not follow that "even using the words gas mileage is just wrong."
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Old 12-17-2012, 06:02 PM   #7
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Thanks Jeeperz. Hopefully that's the cause.
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Old 12-17-2012, 06:10 PM   #8
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You are not alone my friend. My 2012 automatic 3.73 geared JKU is lifted with 35" tires but I was getting 17+ mpg in the summer. Now it dropped to about 15.8-16 mpg. Winter blend gas and some warmups are to blame im sure. Just enjoy your Jeep and tell your friends and co workers to buy Hybrids, my Jeep needs the gas.
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Old 12-17-2012, 07:01 PM   #9
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Cold weather alone will drop gas mileage, regardless of 'blend' and warming up the engine.
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Old 12-17-2012, 07:11 PM   #10
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Quote:
Originally Posted by mcgee10 View Post
Buying a Jeep wrangler and even using the words gas mileage is just wrong. No one buys a wrangler for the mileage. I have 7000 miles on mine and the days I get 15mpg are the good days.
Totally disagree; other than the fact I wanted a 2dr Wrangler; gas mileage was a deciding factor...the JK gets twice...yes 2x the mpg of my previous DD
A F250 4dr 4x4 with the 5.4 gas motor
oh and at 261,000 miles have learned about the cost of fuel & mpg
When I started with the truck gas was $0.98 gal now $3.00 plus
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Old 12-17-2012, 07:22 PM   #11
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Winter blend fuel could drop it 1-2 mpg. However, when you fill up do the math rather than relying on the computer. That will give you the most accurate mpg.
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Old 12-17-2012, 07:26 PM   #12
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Thanks for all the responses. I guess it's the winter blend. Just got a bit concerned because I read up on the dreaded Penstar issues and I believe one was dramatically lower gas mileage.
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Old 12-17-2012, 07:55 PM   #13
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Coming from a 5.4L f150 the MPG of my 2013 JKU is a god send.
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Old 12-17-2012, 08:38 PM   #14
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I throw a mini party whenever I break 13 mpg. Be sure to use a fuel app on your phone. Tracks all kinds of good stuff for you.
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Old 12-18-2012, 11:38 AM   #15
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Here in MN my mileage drops about 1 1/2 mpg in the winter always did on my Avalanche as well. We do have Ethanol in our gas but it is year round 10% blend it too will, like the cold weather, affect the mileage.
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Old 12-18-2012, 03:31 PM   #16
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I throw a mini party whenever I break 13 mpg. Be sure to use a fuel app on your phone. Tracks all kinds of good stuff for you.
Out of curiosity, which app are you using?

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