140 miles as measured by GPS? And how do you know you actually used 6 gallons? Do you have a flow meter on your fuel line?

The only way to measure fuel economy is miles driven divided by fuel consumed, and unless you have a flow meter on your fuel line the only way to get a semi-accurate fuel consumption figure is off of fillups of the tank where either the same pump shuts off at the same point or you spill it out the filler neck every time.

Any other way (tick marks on fuel gauge, uncorrected speedo gear) is a guess at best. Doesn't matter how many times you've rebuilt the engine.

 

Man I really ain't BSin, when I got the jeep the guy said all he had done was put a 4.5 RC lift and tc drop on it and I went from 33's to 35's then went up to 37's and it needs a bigger lift but the next lift is gonna be 8 inches and hope to have it by spring. I took the head off my 93 ho xj had it reworked and put it on when I was rebuilding the motor because the stock head had cracked between the valves but other than that its stock, cam, crank, transmission, gears because I haven't messed with them

 

98 sport 3" liff 31" tires best was 22 mpg worst was about 10 mpg

 

98 xj 4.0 4.5 lift 33x12.5 winch, roof rack, jcr bumper glue master super 40, headers According to the overhead I get 11.2 mpg but I'm sure it's off. It told be 207 to empty and I went 5 miles and it said 206 to empty.

 

97 Country, 4.0, AW4. 235 tires. about 185K
If you can believe the little computer thingie on the overhead....
AVG about 16.8

I was averaging over 17 when I 1st got the jeep....it had a blown out muffler and cat....changed both and mileage went down. It now has a little restriction, I suppose. Also, it may improve slightly as the computer relearns.

 

Have more miles under my belt now. I can more accurately say that when I drive in the city (NYC stop & go), I average between 12 and 15 MPG. On the highway, if I drive conservatively, I average about 22 MPG. I have a 01 stock XJ with 86k miles and 235/75/15 tires on her. I run MMO every other fill up and every other oil change.

 

Did you recalibarate your speedometer, and are you using the fill-up method, or looking at the tick marks on the fuel gauge?

 

2000 jeep sport 4x4 4.0, with RC 3in Lift, homemade roof rack, the off brand K&N air syatem, and 235 tires.
winter 14-16 mpg (in 2wd)
summer 17-20 mpg

cant complain to much

 

Just pulled 20mpg, and that was after driving with a lead foot, although i rarely go into 5th now.

 

2001 sport 4x2. 4.5"lift on 32's stock gears. Getting 16 hwy

 

2wd FTW

 

00 classic 4x4 stock gears 3" lift 32s... 18 city.
Boom

 

17mpg
1996 sport 4wd
4.0
4.5 lift
32x12.5

 

Where is Uwharrie? $3.20/gal.
We're payin $5.45 Imp Gal,($1.20 litre) equivalent to $4.36 us gal.
Perhaps Bigcook91 is runnin on imperial gallons?
Once upon a time, long long ago, in a land, not so far away, I remember the younger stock Peep able to peak at 28 mpg (imperial gal), about 23/usgal.
Today with only 600Kkm under her belt, 3.5 on 31's she daily gets 21 mpg imperial gal, same as 17 mpgus.
Fuel Economy was never on the list of requirements when the Cherokee was conceived.
Fuel Economy is not on my list of daily expectations. I need to assure arrival at my destinations, in all conditions, so I drive the Peep, and enjoy it!
Addendum: For reference; all my daughters stock Grand Cherokees (95 & 02 4.0L) and the Libby (V6 3.7L) get better mileage by 10% or more than my Cherokee

 

96 Jeep 4 Door Sport 4.0l AW4. RE 3.5 superflex 31 goodyear duratracs, best Ive gotten was 22 on the highway city 17ish. I try to keep the rpms below 2,000 and that helps me out a lot with gas.