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Unread 03-09-2011, 04:41 PM   #1
1ststater
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Increasing Gas Mileage

I have a 2008 (bought new 9/07) Sahara loaded - added 2"lift and K/N air intake , has 90k miles...all highway. Any quality info on increasing the mpg. I'm getting on avg 18 mpg.

Thanks!

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Unread 03-09-2011, 04:43 PM   #2
bds5
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Wish I was getting 18mpg.
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Unread 03-09-2011, 04:46 PM   #3
2005X
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Quote:
Originally Posted by 1ststater View Post
I have a 2008 (bought new 9/07) Sahara loaded - added 2"lift and K/N air intake , has 90k miles...all highway. Any quality info on increasing the mpg. I'm getting on avg 18 mpg.

Thanks!
did you add the sticker with your K&N? that may be your problem
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Unread 03-09-2011, 06:47 PM   #4
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Quote:
Originally Posted by bds5 View Post
Wish I was getting 18mpg.
+1, you are diving a jeep not a honda civic. They get bad gas mileage.
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Unread 03-09-2011, 08:05 PM   #5
Just_Jking
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18... you should be ecstatic.. I get 15.5 and if the wind is behind me 16.5
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Unread 03-09-2011, 09:41 PM   #6
Troller1234
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Try coil spacers on the rear springs, that way you are always going down hill.
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Unread 03-12-2011, 09:02 PM   #7
My1989Jeep
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Tune up, spark plug wires, symthetic oil, and proper tire pressure.
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Unread 03-13-2011, 04:45 PM   #8
chadsmeltzer
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EPA says 08 JK gets 15 city 19 highway, I would say your 18 average is nothing to complain about at all.
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Unread 03-13-2011, 04:47 PM   #9
LJameson
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Do what I did and buy a Focus. Then you'll get 35 mpg
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Unread 03-13-2011, 04:55 PM   #10
fishinjeeper
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Quote:
Originally Posted by bds5 View Post
Wish I was getting 18mpg.
X2. 18 is good. maybe just a tune up and new o2 sensors might get you to 20 a gallon
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Unread 03-13-2011, 05:01 PM   #11
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As previously mentioned, I would also recommend changing all the fluids to a quality synthetic such as Amsoil. It is not a huge difference, but every little bit helps.
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Unread 03-14-2011, 07:58 AM   #12
zerocool333
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Yeah 18mpg is really good. We have a lot of hills here but I was able to squeeze out 17mpg (city) in my 4.0. Tune ups help as well as correct tire pressure helps. For me, driving like a granny and trying hard to keep the RPMs below 2k helped the most.
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Unread 03-14-2011, 08:48 AM   #13
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X2 nothing being around that is going to improve your MPG. Certainly that K&N isn't helping to do anything but allow more fine dust, silica, dirt, etc. into your engine. That's about the worst air filter there is for actually filtering dirt out of the air. They don't add any performance or mpg benefits to the TJ whatsoever, despite their marketing hype.
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Unread 03-14-2011, 01:28 PM   #14
imlikeojnow
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I got rid of my bronco that got 11 miles to the gallon for the jeep with 4.56 33s 3 inches of lift, and i get right at 18 and that is all city driving. havent figured highway yet. i cant complain really.
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Unread 03-14-2011, 01:59 PM   #15
Cards81fan
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Aside from what everyone listed, which basically says you are already doing very well, you can get an all-season or highway tread tire in a lower weight and narrow tread width. Of course, the less aggressive the tire the worse it will perform off-road. So caveat emptor

Also drive as gingerly as possible. If you really want to know how easy you are driving, you can install a vacuum gauge and try to drive keeping as much vacuum as you can. Generally, the higher the vacuum the less fuel/air you are using, and the better the mileage.
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