I have a 95 ga gt... i've never felt like it was all that great in the mpg. I've figured i got about 26 highway, and 20 city. I tried to measure it years ago and that was what i came up with. It seems like a good general idea but who know i could be way off. It seems to burn alot of gas for not alot of power cause of the 3.1. Oh well still love my car.