Im getting horrible mpg in my 01 7.3 auto crew cab. It has a 3" lift on 35's.I drive it very conservative. Its got a fresh fuel filter, fresh air filter, always run standyne. The truck drives fine otherwise. I can't find any evidence of the brakes hanging up. Literally a 10 mile drive to work you can watch the fuel guage drop. Ill be lucky to get 110 miles on a half tank and its a 25gallon tank filling it to the top. Anyone have some suggestions?