1993 4.0 HO, auto trans .. very basic, no power amenities

229k on clock, rebuilt /new engine somewhere in its travels, but no paperwork on such .. I think rebuilt .. to basic

3" lift, 31 inch ATs

safari basket w/ tire on top

getting not too great mileage .. but I have no EGR .. AC components were yanked out in engine compartment also


my 1990 renix Laredo manual trans got way better mileage than this 1, that was stock all around .. probably 20

quick guess ... Im getting 15 mpg .. on a good day .. more like 10 when I romp on it

Definatly running rich .. I may swap MAP sensor to see if it helps on richness.. renix engine was super rich with bad MAP

this 93 seems too rich, but it passed emissions .. seems my oil gets dirty feeling at 1500 miles.. like gas / oil .. gonna change it at 2k for awhile to be on safe side

** serious mpg note .. when i got tire up on top, seemed to get way less mpg's .. lookin into a wind fairing .. but dont think it will make much difference .. especially since that basket has light mounts on it .. lights sound like a fun project .. light up the campin trails this summer .. 2 lights up top & 2 on soon-to-be brushguard / deer catcher ... wahoo !!!

gotta pay to play !

 

96 4.0 4x4 auto

Stock for now with new plugs wires cap rotor bad cat
Getting 17.2 mpg
Got 18.5 with a 80 mile high way trip with cruise set at 65

 

95 xj 15 mpg

 

96 xj, 4 inch lift, 33" muds on aluminum wheels, cowl intake, L and L fabrication front bumper, lockers front and rear, full size 33" spare on steel wheel, easy driving = 14.9 mpg

Plans to install 4.56 gears, 99 intake manifold bored, throttle body bored, new exhaust manifold, cat and exhaust

 

85 Xj w/71 IH tractor motor n 3.31:1 gears, 31x10.50s on 4" lift. 16mpg. (High TQ of motor coupled with the original V6 gearing acts like a 4.0 w/4.10s on 31s)

 

What? Pics please

 

1998, 3" lift, 31" Duratrac M/T's, stock aluminum wheels. My average is 13.8 mpg. Mostly country roads or highway (I despise freeways ). Not quite terrible; yet . I'm about to throw a roof rack with a spare tire, highligt, ax, shovel, and five, six inch lights on the top. That ought to do wonders to my mpg lol.

 

93 grand cherokee 5.2 V8, one tons and 37's, 5.5" lift 5.38 gears, 16mpg average over several tanks of gas

 

So how many of you have adjusted your spedo for bigger tires and different gears?

 

Probably very few in here. Not that hard to do I just don't care.

 

2001 XJ; AW4; NP242: 8.25; 3.55; 30x9.5x15
10-13mpg right now

Haven't had a chance to check it after I replaced the O2 sensors, spark plugs & put 784 injectors in. (damn water pump!) But hopefully that will put me back in the upper teens.

 

Mine's a 2000 Limited 4L ...I drive mostly in town back & forth to work.I average 17mpg. I thought I might could do better but not after seeing these other comments. It takes a long time for mine to warm up in the morning or at least for the heater to warm up...flushed the radiator last year & had a lot of rust in it. Any thoughts?

 

Typically a thermostat popped open. Replace with a Mopar 195. Another member on here noticed similar issues and traced the problem to his O2 making the engine run rich, prolonging warmup and poor fuel economy

 

I have a 1992 5 speed 4.0 HO
245/16s. I'm getting about 17 city, got 24 on the way to wolf creek from where I live (Amarillo). Dunno if my jeep was running good or what that day. Only real long trip I've been on since I've had it, got new o2 sensors, fuel filter, cowl intake mod, neon injector swap. Some other things too.

 

7mpg with my 92 stroker