Anybody have any feed back onthe 6.7 motor. A friend is wanting a new truck he wants a deisel and is comparing i have the 5.9 and love it he may be able to get a good deal on a mega if he orders it but it will have the 6.7. A salesman has told they may get better fuel mileage but who knows. Thanks guys. I got 23.9 to the mountains of nm and 21.7 on the way back.