what's your gas mileage?
#46
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Year: 1999
Model: Cherokee
Engine: 4.0 I6
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the easiest way to know your actual speedo error is of course GPS. as for individual calculations, just PM me and I'll calculate for you what your actual mileage is with oversize tires. i did for 31x10.5x15. my error is 1.109. ie, for every 100 miles on the odometer i've actually driven 110.9 miles
#47
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Year: 1997
Model: Cherokee
Engine: 4.0
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1997 dead stock in town/hwy mix = 20 mpg
driving normal not easy or hard
4.0 - 5 speed - 235-75-15
3.07 gears
driving normal not easy or hard
4.0 - 5 speed - 235-75-15
3.07 gears
#48
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Year: 96
Model: Cherokee
Engine: 4.0L
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96, 3" lift, 34k, aw-4, 31" tires, customer bumpers(kinda heavy) c17/h21. There is more to life than fuel mileage that's what honda's are for.
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#50
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Year: 96
Model: Cherokee
Engine: 2.5l I-4
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'96 Cherokee
149,800
225/75/15
speed limit, or slightly above. With the occasional burst into the 4,500+ rpm range (because I can)![W00t](https://www.cherokeeforum.com/images/smilies/w00t.gif)
Nothing aftermarket other than platinums and 8mm wires
City/Hwy ratio: 25% / 75%, 20 mpg /25 mpg, 24 overall
* 2.5l 4-banger w/AX5 (it DOES move when you punch it
)
149,800
225/75/15
speed limit, or slightly above. With the occasional burst into the 4,500+ rpm range (because I can)
![W00t](https://www.cherokeeforum.com/images/smilies/w00t.gif)
Nothing aftermarket other than platinums and 8mm wires
City/Hwy ratio: 25% / 75%, 20 mpg /25 mpg, 24 overall
* 2.5l 4-banger w/AX5 (it DOES move when you punch it
![Boxing](https://www.cherokeeforum.com/images/smilies/boxing.gif)
#51
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Year: 1999
Model: Cherokee
Engine: 4.0 I6
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THE HULK IS BAAAAACK. AAAAARRRR!!!!
(btw, i don't care if people get mad about all capital letter post. i'm waay too happy to care)
#52
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Year: 1995
Model: Cherokee
Engine: 2.5 4 cyl.
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'96 Cherokee
149,800
225/75/15
speed limit, or slightly above. With the occasional burst into the 4,500+ rpm range (because I can)![W00t](https://www.cherokeeforum.com/images/smilies/w00t.gif)
Nothing aftermarket other than platinums and 8mm wires
City/Hwy ratio: 25% / 75%, 20 mpg /25 mpg, 24 overall
* 2.5l 4-banger w/AX5 (it DOES move when you punch it
)
149,800
225/75/15
speed limit, or slightly above. With the occasional burst into the 4,500+ rpm range (because I can)
![W00t](https://www.cherokeeforum.com/images/smilies/w00t.gif)
Nothing aftermarket other than platinums and 8mm wires
City/Hwy ratio: 25% / 75%, 20 mpg /25 mpg, 24 overall
* 2.5l 4-banger w/AX5 (it DOES move when you punch it
![Boxing](https://www.cherokeeforum.com/images/smilies/boxing.gif)
![](https://www.cherokeeforum.com/images/icons/icon10.gif)
#54
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Year: 2000
Model: Cherokee
Engine: 4.0 high output, Alabama Cylinder head, 60mm bored TB
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x2 what everyone said about the odometer being off for the larger tires. If you have stock gears and larger tires you will get worse city mpg, since the engine is working harder to move the tires, and better highway mpg since you can run higher speeds at lower RPMs. Thats if you aren't lugging the engine.
I have a 2000 XJ 4.0L, NP231, Auto, 96K miles. 235/75/R16 tires which are about 30"...more like 29.8". 2.5" exhaust with highflow cat and flowmaster super 40. I also have an Amsoil EA air filter that fits in the stock air box. I get 15-16 city and 19ish highway. When I put in the Amsoil filter I noticed a 1 mpg increase. A big factor with XJs and mpg is ethanol in the gasoline. In CT most stations have 10% ethanol in the gas which can result in up to a 15% decrease in mileage. When driving back from Maine I filled up with non-ethanol gas and got 22.5 mpg on the freeway, the highest I've ever gotten.
Running Marvel Mystery Oil in the gas tank every so often has helped me as well as some of my friends get better mpg, especially in winter. I have new spark plugs (champion coppers) also, but haven't put them in yet, hopefully I'll see an increase after installing them.
Those of you with larger tires might want to leave the tranny (auto) in 3rd gear on hills. The engine will rev higher but have to work less. It gets the best mpg around 2,000 RPM at highway speeds. I've found that leaving it in 3rd on a hill going 50-55 mph makes a difference instead of lugging it in overdrive.
Those of you getting 9-13 mpg might want to look into replacing your O2 sensors. They can get lazy over time and make the engine run richer without throwing a code. My friend with an '01 Ford Ranger 3.0L 4x4 saw a 2 mpg increase city and highway from running synthetic motor oil and diff fluids. Not saying it will work for everyone, since after all it is a Ford.![ROFL](https://www.cherokeeforum.com/images/smilies/rotfl2.gif)
*All above mpg calculations are based off data recorded over a 2-3 month time period.
I have a 2000 XJ 4.0L, NP231, Auto, 96K miles. 235/75/R16 tires which are about 30"...more like 29.8". 2.5" exhaust with highflow cat and flowmaster super 40. I also have an Amsoil EA air filter that fits in the stock air box. I get 15-16 city and 19ish highway. When I put in the Amsoil filter I noticed a 1 mpg increase. A big factor with XJs and mpg is ethanol in the gasoline. In CT most stations have 10% ethanol in the gas which can result in up to a 15% decrease in mileage. When driving back from Maine I filled up with non-ethanol gas and got 22.5 mpg on the freeway, the highest I've ever gotten.
Running Marvel Mystery Oil in the gas tank every so often has helped me as well as some of my friends get better mpg, especially in winter. I have new spark plugs (champion coppers) also, but haven't put them in yet, hopefully I'll see an increase after installing them.
Those of you with larger tires might want to leave the tranny (auto) in 3rd gear on hills. The engine will rev higher but have to work less. It gets the best mpg around 2,000 RPM at highway speeds. I've found that leaving it in 3rd on a hill going 50-55 mph makes a difference instead of lugging it in overdrive.
Those of you getting 9-13 mpg might want to look into replacing your O2 sensors. They can get lazy over time and make the engine run richer without throwing a code. My friend with an '01 Ford Ranger 3.0L 4x4 saw a 2 mpg increase city and highway from running synthetic motor oil and diff fluids. Not saying it will work for everyone, since after all it is a Ford.
![ROFL](https://www.cherokeeforum.com/images/smilies/rotfl2.gif)
*All above mpg calculations are based off data recorded over a 2-3 month time period.
#55
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Year: 2000 Sport
Model: Cherokee
Engine: I6 4.0
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For people who have bigger tires and/or gearing. How exactly are you figuring your mpgs? Most people dont change there speedo gear to make there odometer right so i am assuming 98% of you havent. Which makes your trip meter off. which makes figuring your mpgs from it not very accurate.
just wondering
just wondering
#57
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Year: 1994
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i have stock lift and 235/75r15 tires and i get around 16/23 i'm hoping not to see a MAJOR decrease with my 4.5" and 31s about to be put on
#59
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Year: 1992
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Engine: 4.0
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My point was that people are listing off mpgs and actually have no idea unless they have an od on there gps, or drive real far and use mile markers
#60
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Year: 1998
Model: Cherokee
Engine: 4.0
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Absolutely factory stock, 99 Cherokee, 4.0 liter 6 cyl auto Selectrac.
Since replacing the engine (due to bad bearings poor maintenance) and replacing all fluids and oils with fresh stuff. Synthetic oil in engine only
Over 3000 miles of combined driving--all on the road- 18.5 mpg. Highest tank was a little over 20 mpg.
Since replacing the engine (due to bad bearings poor maintenance) and replacing all fluids and oils with fresh stuff. Synthetic oil in engine only
Over 3000 miles of combined driving--all on the road- 18.5 mpg. Highest tank was a little over 20 mpg.