Xjforme
NAXJA Forum User
- Location
- Hills Of Washington
Can anyone tell me the difference from upgrading tire size and the difference in gas mileage with stock 3:55 gears? I'm currently running 30x9.5x15 and would like to upgrade to 31 or 32 depending on what type of mileage I will get. I'm currently getting 15 mpg on average from a 00 xj 4.0L and a Auto.