I told you guys before if you have the optional air suspension run up the back. The higher the back compared to the front the more down hill your going and the better the mileage. I have the back about 6 inches higher than the front and almost get 30 mpg which is plenty good enough for me. If I want more I know what to do. Watch that trailer towing though;too much hitch weight drops the back and their goes the mileage so as you see it has nothing to do with towed weight or total weight its keep it going down hill. Your Welcome
