I never realized what a profound difference winter/summer driving has. During the winter, if i got 23mpg I thought i was doing pretty good. Since its warmed up Ive taken a few runs where the trip average is between 33 and 36. I know some of it has to do with not idling near as much, but that doesnt explain all of it.

During the winter, my trip to church (32mi) would average 21-24 in rolling terrain at speeds between 35 and 55, last sunday my trip average was 33, today it was 29, but i had the windows down.