Puddin'

I got a 4.5" lift and 32's with 3.55s... And I make the 250 mile trip to school about 10times a year.. The light doesn't come on, but after I get there and a couple days of driving around (10-20 miles) it comes on. So about 270ish


But I've noticed my fuel light comes on and a lot of times I'm only able to put 13-15 gallons in the tank? I know it's a 20 gallon. Just seems kind of soon for the light to be on and still having 6 gallons (about 100miles) left in the tank..

Hapdad

I am only running 235's right now but I tend to get about 18-20 depending on how I drive it. If I drive it like I stole it I can get it down to about 16.5 or 17. If I drive Ms. Daisy 20.5 or maybe slightly more.
Hapdad

Kris smith

My 88 when I got it was doing 20 mpg if I took the doors off if get 21-22 that's with 4.5 lift and 31s and 307s I now have 3.55 gears and I haven't ran a full tank yet I was getting 180 a tank yeah I have a 13.5 gallon tank

stang65

I used to get around 320 with 4.5" and 33s in my jeep when my tank wasnt smashed. now ill get around 260 and tank but its gone from holding 16.8 gals to around 12.9 gals

highmileage

Mine is about the same unless I am on a long road trip then it will kick up another 10 or 15 miles.
Had a best on one trip pulled 440ish out of a tank.

mongold88

What size tires is everyone running? I was thinking about 31's but Idk how bad that will hurt my gas mileage. Right now I have 235/75/15's

XJwonders

Yeah I'm running 235's. with my 31s on. I get like 190 miles per tank. Like I said earlier. I got a bad trans

s346k

i can get 17-17.5 gal in it right after the light comes on. interstate use reduces my overall mpg.

highmileage

Used to I would get 17 to 15gal with light on, but the past year the light has been lying "ALOT". One day about a month ago I let it come on and only took 12 gal to fill.

mrfajita

This. I'm lucky to get 200, though heavy 33s, stock gears, cracked header, clogged cat, etc...lol.
That is 200 to the low fuel light, which comes on with about 4 gallons left

thatXJguy

I get about the same, with 33s and 3.55 gears.

If I'm careful and keep it around 1500 rpms, I can pull 300.

mongold88

What do you think 31's would get

thatXJguy

Much lighter than 33s. So probably another 10-20 miles. Depends on the tread pattern. Some rubber and patterns offer more resistance. All terrain tires are made with harder rubbers and flatter patterns and have the least amount of resistance on the road.

94XjSport94

I'm on 35's with 4.56's and I get 14 ish.

I need to do a little tune up and I'm burning some oil.

XJmike0122

The way I drive with 33s and stock gears I get 18mpg easy. Yeah I leave 20 minutes earlier for work in the XJ but it saves gas and more me time.