Bought this truck used in early May and finally got to take a long trip with it the first of this month. The truck is bone stock with 60k miles. Mileage bumped 19 from Oklahoma to Colorado and back. It was really fun to pass the Chevy's and Ford's going up the mountain passes and then letting the engine brake hold it steady coming back down. Going up hill it RARELY dropped out of 6th. Only guy that passed me was a Duramax blowing huge clouds of black smoke.