"Slap hands slap hands"
Just put a set of 33x12.5 MT with 22 wheels it lowered my mileage a bit. Drove to LA and back last week and got 14.7mpg was getting close to 15.5-16 with my toyo ATs. Using archoil9100 and Lucas fuel treatment. New tires didn't affect my towing mpg Hardly at all that stayed right at 12-12.5.