well I just got back from a trip to PA, me and dad left this morning to get a starter for his massey ferguson tractor. We took my civic and I figured it up and averaged 48 mpg on that tank. I went 455 miles and when I stopped to get gas I put in 9.5 gallons. I'd have to say thats the best mpg that my car has ever gotten. I just took some more ibuprofens and I'm just taking it easy now till I goto work bingo tonight for the fire dept, they should be kicked in by the time I go over there.