I have an M6 '06. I get 18-21 mpg back and forth to work. This involves very little stop and go driving so its a little biased. The best hwy mpg was a run up to PA to see my Dad with just me in the car and the normal luggage I got a best tank of 28 mpg. Last time ran up there with 3 people and all our luggage the best I got was 25.6 mpg. So it CAN do great on the hwy depending on how you drive it.
|