Gas Milage

[Pvpmedic]

I have a 98 xj, with 6.5 inch RC list, 33 inch tires, with 4:10 gears, throttle body spacer, the stock intake manafold from the 98 kept cracking on me so I read that the stock 99 intake manafold was more reliable no idea why, so i got one and put it on my 98 and have had no cracking. With all this I get about 190 miles in town on a full tank. Does that sound about right? I have a 99 xj all stock and i get about 300 miles in town on a tank. Just want to make sure i dont have anything wrong . What gas milage do you have on your rigs let me kknow.

 

[thechief86]

all terrain tires weigh a little less, and the roof rack creates a little more wind drag. you can replace the mechanical fan with another electric one, and try to cut down on weight a bit and maybe gear the axles a bit lower to avoid bogging on long hills. you're not looking at great mileage in a built xj, but you can improve it....

 

[Pvpmedic]

What gearing would you suggest I change to, i have 4:10 now i have lots of power i can peel out. The gas milage doesnt bother me to much but if it can be better why not

 

[Baja_XJ]

Go 4:56

 

[Johnnie Walker]

With your tire size, 4.56s should help out your in-town mileage. A lot of dakota guys go with 4.56's with even shorter tires than you have and pick up city driving mileage and lose minimal hwy if any.

 

[RidgeRunnerXJ]

I have a '99 4.0/auto/4:10 gears/33" KM2s but no roof rack and I get about 14.5 in town. 200 mi when the fuel light comes on. I'd say go to 4.56, that's what I'd like to do.

 

[kidarkitect]

are you calculating for tire and gear change or has speedo/odo gear been adjusted/replaced for that setup.

you may be getting more or less than that. either way it sounds about right to me. just my .02 tho.

 

[CherBear]

The roof rack costs you a lot of mileage, especially highway. I would recommend removing it you plan on going on a long trip.