Re: Impossible MPG ???
I pretty much use the cheapest midrange I can find, that does not contain ethanol. I drive conservatively and average 27-28 highway. On a long slow trip (60-65) I got close to 31. I've used premium in both the Crossfires and my A6 and never noticed a difference in gas mileage. PS - Since I don't drive the Crossies much anymore, I switched to premium and noticed no difference in mileage.