My '08 iron barrel consistantly gets 62-63mpg (US gals) no matter what I do -- putter, or run at 55-65 (It doesn't like the higher number there 'cause it starts weeping oil out of the cylinder head... like saying, "Slow down, fool and get on a back road that you and I both like!" REs forever! Once you get used to the quirks, ya can't live without 'em, and the gas mileage price is RIGHT too!