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Unread 07-06-2009, 09:46 AM   #16
MyZJ98
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1997 ZJ 
 
Join Date: Jul 2008
Location: Ellington, Connecticut
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Was in a hurry on the highway the other day, and was riding around 85-90 (didnt seem like I was ) and just for ha-has I check the computer and I was reading 21mpg, I was pretty shocked, but I'm also a stock 4.0L except custom intake, and short straight pipe off cat, and it was steady, no traffic or slowing down/speeding up either. Normally I look at ~15/19 city/highway.

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Unread 07-06-2009, 09:52 AM   #17
ezflip
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Quote:
Originally Posted by MyZJ98 View Post
Was in a hurry on the highway the other day, and was riding around 85-90 (didnt seem like I was ) and just for ha-has I check the computer and I was reading 21mpg, I was pretty shocked,.
The computer is more for entertainment anyway and is rarely very accurate. Mine usually reads between 22-28 even around town. But I still only get 13.8 when I actually do the math after I fill up.

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Originally Posted by g-off70 View Post
that is about what i am getting. i think i am keeping my foot out of it for the most part. this is also with the AC cranked all the way up all the time. dang texas heat.
Im in Michigan so really no need to crank the AC quite yet. I'll be doing plugs and cleaning the IAC and throttle body tonight though so we will see if there is any increase. Oh, new shocks go in tonight too
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Unread 07-06-2009, 09:54 AM   #18
ISUzj
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I have spent 0 dollars on gas for my jeep in the last month in a half....I guess that is good gas mileage, when I get back to the US, it probably will still be the 15/18 I am used to.
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Unread 07-06-2009, 10:16 AM   #19
SnowLeopard
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I don't know how anyone can get such a good overall mileage with a 4.0. Unless you're going on flat terrain without much variance of speed. Btw, my trip computer is pretty dead on. So I don't know why others' aren't. after calculating the mileage in my head for a time, I finally gave in. It's close enough that I don't bother with figuring the exact numbers. This last weekend with my driving 70 or above for the majority of the trip, at least half of the time with OD off, and then probably 40 miles directly in the mountains, I averaged 19.2mpg according to the trip computer. As I said, it's pretty close. Now as for my gas gauge... If only that would be more accurate!
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Unread 07-06-2009, 12:06 PM   #20
Robb_
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I have learned on long trips if i dont use my cruise control I get better mileage.
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Unread 07-06-2009, 12:48 PM   #21
SnowLeopard
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I don't use it in areas where it won't work well, having to downshift, but I do like it on the interstate and open highway. Cruise is my friend. But it's not a great thing with the I6. At least when it comes to mileage.
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Unread 07-12-2009, 08:24 PM   #22
clmm69
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1995 ZJ 
 
Join Date: Jul 2009
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I'm getting about 15mpg on average. I haven't been on a long flat trip yet but that's what I'm getting so far.

I do have a 3.5" lift with 32's.
95 with a 5.2L
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