Originally Posted by Darkness95m3
Huh, my 540i gets over 31 MPG on highway and 24MPG city, that's better then some 6 cylinders out there.
Somebody set up the bomb to your calculator. The EPA rating on your car is 17 city 21 highway, and EPA ratings are absolute best case conditions - done on a dyno, at constant speed and load, accelerating like grandma. In other words you'll never hit those numbers, reality will be much worse, especially if you drive with any kind of enthusiasm.