I am only getting 12-13 mpg. I have 33s. What are you guys getting?

15 - 16 on the interstate
18 in town
We run 33s, 456 gears, and a Turbo City Air Intake. Plus, I took the lead out of my foot :D

14-15 here. 33's with 4.88's. If I would get rid of the top rack I'd probably do better on the highway. I remember when I used to get 17-18.

14-15 here. 33's with 4.88's. If I would get rid of the top rack I'd probably do better on the highway. I remember when I used to get 17-18.

Were you getting 17-18 on 33s?

LOL. No.
17-18 was back on 215's when the jeep was new.

LOL. No.
17-18 was back on 215's when the jeep was new.

I was about to ask what your secret was!

12-13 seems to be about standard..... i think the only time I got any better was on a superlong freeway trip! even that was only 15 ish My new 44's have got 5.89's in them so we'll see what that does when i get them in ! higher rpm bigger tires should equal worse but less load on motor = better mileage? we'll have to wait and see!

2004 SE 31s 18 mpg 4.56 gears

WOW!!! I feel good about my Jeep now!!! I'm getting 22-24 with my 2.5 running 4.10's and 30x 9.5's...... I was getting 18-19 until I switched oil to Amsoil

Lol, I'm using Gastrol GTX 10w-30, and I'm getting like anywhere from 15 to 18 city, and like 18-22 highway...depending on how I drive. If I baby it, than it gets like 18 to 20 int he city, and still about 22 on the highway. Of course...I'm running just little goodyears...I forget what the stock hieghth is.

15mpg however no tune up - 33's without regearing.. Ack!
2.5Liter

12-14...mostly stock...32's

I get roughly 20-22 on the highways. I have 31's and stock gearing. I've noticed that with every vehicle I drive... I got dang good mileage when driven under 3k on the tach.

My XJ is doing much better now than my Yj. I have used 3/4 of a tank and I am at 477km.

im getting about 14mpg on 31s but im locked front and rear.

use to get about that with the YJ my buddy let me use for alittle, but thats all my 4.0 gets on 31s but its locked front and rear.
-Keep Jeepin

Stock with 31"s I got 20-22 highway MPG.
Lifted 5" and lost 3-4 MPG.
PUT 33"s on and lost 3-4 MPG.
I get 13-15 MPG now with stock 4.10's but I got 4.88's in the garage waiting for a free weekend and I'm cusious what that'll do to my MPG.

I'm not sure what I am getting per mile (never thought to do the math), but per tank I am getting around 265-290 miles. I have done a royal purple oil change with a k&n filter, and recently installed a Banks catback exhaust (SWEEEET!!!), air raid t-body spacer, and installed a k&n air filter. Before I had problems staying in 5th on the highway sometimes even downshifting to 3rd on some hills (which still only got me to 40-45mph), but now I can stay in fith and I am cruising at 65-75mph. I still have stock gearing. running 33's no lockers. not to mention this rig sounds really mean. My next step is gearing and lockers, then headers.

i get about 13 MPG with my wifes jeep. it is on 33" mt/r's and 4:88 gears.

the 4.0 6 cyl. does better with 35" tires and 4:88 gears/

Do 488's make a real difference in performance?? I kinda want to know if it's worth pulling apart the axles.

Man... I'd like to know how you guys are getting over 20 stock with 31's... hell I'd even like to know how your getting over 15 stock with 31's.

Man... I'd like to know how you guys are getting over 20 stock with 31's... hell I'd even like to know how your getting over 15 stock with 31's.


Not sure if it helps your situation... but, I have a t/body spacer, k&n, mod air box, and flow-through straight exhaust (glasspack), and no cat. However, I have just recently installed a R.E. 4.5" lift so I'm sure my mileage has dropped. The best thing I found to help with mileage is #1 keep your foot out of the gas,#2 do regular maintenance, especially your ignition and fuel system. But, I'm sure you all know that.

A little off the beaten path of getting better fuel economy... If anyone is looking for more power/fuel delivery I know a guy the works for Edge Performance that can build Juice boxes for our 4 cyl.'s.

I am getting 17-18 MPG in combination driving with 4.10s and 32" tires. I drive as smooth as I can and drive pretty slow.