Originally Posted by gtr
Yuck! I get 27-28mpg on the 911turbo X50 and there is no reason for the M3 to have worst milage since it has less HP. Well, if it is heavy maybe...
Sorry, but if you're getting 27-28 mpg with your X50 turbo, then you must be driving with a strong wind, down a hill and like grandpa! My 997 turbo never got close to that kind a mileage.