I went from Eastern IL to Western IL today to help a buddy with some PC networking issues. It is about 470 miles mostly on interstate. I managed to keep an average mpg of 55mpg+. This was calculated after a fillup on my way home. I just wish I could figure out how to do this in the city. I mangaged this by keeping speed at 62mph and a couple of runs in areas at 55mph in construction zone. Peace, Fr. Bill