with 235's on my 95 16v 3sp. auto tracker im getting roughly 25 mpg....no matter what, as long as im in 2wd....4wd kills the mpg's...i've gotten as bad as 40 miles out of almost a whole tank, but this was all 4low driving in crazy state trails and what not, also, i noticed a bit of a drop in fuel mileage when i installed my own home made cold air intake....i have 2" exhaust from my manifold back, and a cherrybomb turbo style muffler and no cat....gotta love michigan with their "no emissions testing required"