yeah, used to get decent gas milage in my wrx, after i started tuning it i get around 33 to 34 on highway with stg2+ custom map. the tuning definately makes the engine run alot more effenciently...ie...better fuel econ. ill be busy for the next two weeks, have a trial i have to attend as a witness, trying to keep my friend out of 5 to 10 in jail for something that never happened. If you are interested in tuning, i live in sarasota.