ElyasWolff

For reference I get 17.5-18MPG on 32 inch ATs with 4.88 gears

VaNomad0530

x2 on the mpg. I have 4.88's and 35 x 12.50 with 16in steel rims. I'd be curious what a difference it makes with alloy rims...

RacerXS

From what i've gathered, you get little to no fuel saving & can get worse in some cases.......but you get a nice increase in power.

thejeepjunkie

well from what i was at with my 3.21's in mt 6spd x i would be in 5th on the highway with my 33's and top out at 65 now i can hit 100 with ease on 35's and my rmps arnt burnin much considering what im driving

ARinmyJK

13.8-14.5 as calculated by the Jeep's computer. 6sp, 4.88's, 37's Down from 16 average mpg stock Rubicon.

1BAMFR

I'm getting around 14 MPG

I have 35's, 6-Speed, and 4.88's

STxWrangler

13.5 to 14.0 mpg on 35's, (the heavy Toyos), with 4.88 gears and a 6 speed manual tranny.

W4TX

i just bought a jeep and still learning what needs to be done but my question to all of you is at what speeds are ya;ll running down the hwy ? while getting these mpgs and with your different gear ratios what kind of rpms, gears seem to be by biggest hang up while planning my mods

crawlermike

4.88,35" tires, 6spd, RPMs 2800-3000 @ 70 MPH

Red Dog

I have just got mine in and the thing reads 16.8 with the 35" tires. I do a lot of freeway driving. I don’t think I will keep getting these kinds of number all the time.