I bought my TJ about 5 years ago and always checked MPG. It is a 4.0, 42rle, 5.38 gears for the last 3 years and 4.10s before and MPG never changed. It had Dick Cepek mud 35s from the previos owner, then M/T Deegan 38s the same size. Every time I bought gas MPG was 10 +/- .2.
I now have the...