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Old 12-06-2012, 06:24 PM   #1
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MPG way too low ??? AHHHHHH

So
I feel like screaming. everytime I read a post about MPG you guys all seem to be getting so much better MPG then me with bigger tires.
So here is what I have and what I did

97 TJ 2.5 5 speed 30in tires 2in lift 170000 mile
new cat
new exhaust
new plugs
new wires
new O2 sensors (2)
cleaned Throttle body
K and N air filter type
does not burn or leak a drop of oil

So the number is...............high of 13 low today of 11MPG


what could be causing it ?

P. Scott PS I just raised the tires from 32lbs to 50lbs which is marked on tires

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Old 12-06-2012, 06:26 PM   #2
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Odometer miscalibrated?
Lol

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Old 12-06-2012, 06:28 PM   #3
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I get about the same with my 4.0l, it really doesn't bother me much, if I wanted fuel economy I wouldn't be driving a Jeep..lol

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PS I just raised the tires from 32lbs to 50lbs which is marked on tires
You a running 50lbs of pressure in your tires??
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Old 12-06-2012, 07:32 PM   #4
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The 4.0 I could understand. That's a fairly large straight six. But I too have a 2.5 an mine is on 35s with roughly 27psi in tires. I pull at least 16mpg+
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Old 12-06-2012, 07:35 PM   #5
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Quote:
Originally Posted by pastorscott View Post
P. Scott PS I just raised the tires from 32lbs to 50lbs which is marked on tires
Drop it back down...50lbs is the max PSI for the TIRE not what you should be running with the jeep.

Also, how do you drive it? If your foot is in it all the time, expect to see lower mileage.
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Old 12-06-2012, 07:44 PM   #6
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From what people have told me. The 2.5 actually gets worse mpgs than the 4.0 because it is so under powered. I couldn't say for sure I haven't owned a 2.5. My 4.0 gets 17-18mph
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Old 12-06-2012, 07:50 PM   #7
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I have a 98 with 2.5 on 33s. 5 speed with stock gears. I get approx 15 in city, and 17 highway
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Old 12-06-2012, 07:51 PM   #8
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drive lighter, soft top, soft windows, remove all unnecessary weight. im not sure what your doing wrong, but my 2.5 with 32s gets at worst 18. usually im up nearer to 22, sometimes as high as 26.
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Old 12-06-2012, 07:52 PM   #9
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Check for vacuum leak, replace small hoses and reap the mpg's.
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Old 12-06-2012, 07:53 PM   #10
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do you date fat chicks??
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Old 12-06-2012, 07:59 PM   #11
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do you date fat chicks??
Hahahaha
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Old 12-06-2012, 08:07 PM   #12
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I bet your tripmeter is wrong, if Im not mistaken 4cyl came with 28in tires and your running 30in. Take what your trip is showing and add 10%, see if you dont get around 15mpg
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Old 12-06-2012, 08:17 PM   #13
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I have a 2001 2.5, 5 speed, 30 in tires, soft top and no lift. I drive it very light on the "go pedal." Generally shift at 2500 rpm and the speed limit on my commute never gets above 55 with very few stoplights. Under those circumstances I see about 18 mpg. If I get out on the interstate and run 70 it will drop down to 16-17 mpg. My old 4.0 LJ got slightly better on the highway and slightly worse commuting.
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Old 12-06-2012, 08:38 PM   #14
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2013 wrangler 4:10 rear end went from Montrose Co to Vail Co and back have 1100 miles on it. Got average according to the MPG on vehicle 19.4 speeds as fast as 75 on hwy.
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Old 12-06-2012, 09:11 PM   #15
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put it on jack stands and make sure your not getting brake / or bearing drag.
also drop psi to at least 42psi
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Old 12-08-2012, 03:10 PM   #16
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If you have a smart phone download a free speedometer app. Then you can verify your speedometer is accurate.
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Old 12-08-2012, 09:26 PM   #17
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What rpm are you spinning? I actually get better mileage at 2,700-2,900 than I do at 1,800-2,000.
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Old 12-08-2012, 10:22 PM   #18
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Start running ethanol free fuel. I was getting about 12mpg in a 2000 2.5L, and after using ethanol free I get about 16.5mpg. Big improvement

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