Do you have the 6.4L dual turbo'd PowerStroke? If so what kind of Mileage are you getting? Pulling a trailer and not towing... I can't seem to break freaking 12mpg pulling a small window trailer.. 3,000lbs max. I drive an 08 F250 Supercab short bed 4x4.. Getting right now 10.2mpg in the city and on the highway... 40% city to 60% highway... Im gunna switch back over to the V10 if it doesn't get any better with mileage.. I could get atleast 12 with the V10.