4.0 engine - 167k miles
Auto
NP 231
Dana 30 front
Dana 35 rear
3.55 gears
4" lift
31x10.5x15 tires

Avg mixed driving 14 mpg.

 

96' Sport
161,000 miles
3" lift
Spartan locker in the dana 30
Chrysler 8.25 rear open carrier
32x11.50/15's BFG A/T on Centerline's
was 15 mpg with 3.55 just changed to 4.10's and checked my first tank@ 18 mpg. Of course I've been driving like an old man on my new gears...oh, wait...I am an old man
In the making:rear tire carrier. Had it on the roof and it caused excessive wind drag.
I keep up with my mileage by GPS

 

take all this info with a grain of salt. nobody has said that they have re-calibrated the speedometer gear to compensate for tires and gears.

i have a 95 xj
5 speed
131,xxx miles
33's
4.56's
and have had my speedometer gear professionally calibrated.
weather i ***** foot it or romp on it i get between 10 and 12 mpg. if it s icy and i leave it in 4x4 for starting traction i still get 10.

i also have a beefy grill guard, roof rack, and 4 lights on top of that.
i feel it creates alot of drag at freeway speeds

 

It might weight you down some, but as far as aerodynamic drag these things already have the aerodynamics of a brick wall! lol

 

i have a 87
179xxx miles
33's
and if i remember correctly.. 4.56's
10-12 in town
and yeaaaa... about that re-calibration... cuz im running 33's and on a good day..rolling downhill with a back wind ill get probably 12mpg lol

 

2001
77,000 miles
5sp Standard
33's AT's
4:11 gears
Calibrated Speedo
14miles per gallon on State Highways. Back and forth to work.
In town mpg......don't do that.

 

1997
auto
4.5" lift
32" m/t's
4.10's
speedo calibrated
10 to 12 city
13 to 16 hwy
on the stupid meter is gives an avg. of 12

 

but they would be way under smarty pants

 

Your are correct sir!

Without my calcs my mugs are like 9 or ten. For every thirty miles traveled my odometer reads 24.8

 

'99, 167k miles, auto, 3.55, 4.5" lift, 31x10.5 firestone at, k&n af, apn em, stratus injectors, 63mm tb, high flow cat, flowmaster 40
14-16 town
19-22 highway

'97, 200k miles, 5-spd, 3.07, 30x9.5, neon injectors
14-16 city
20-24 highway

 

I had my corrected for the modifications, and Its constant at 9-10 highway or town.

 

I run stock...
Extremes of what Ive gotten:
Lowest 14mpg
Highest 21mpg

Id say I get about 17 avg...

 

i no im opening up a old thread but how do you recalibrate

 

http://jeep-xj.info/HowtoSpeedoGears.htm