From what i've heard most of the trucks built after the first half or so of 08 are good. A buddy has a real early 08 and had a radiator and some other small problems fixed under warranty, it only took his truck 15k miles to start getting some fuel mileage better than the low teens. Now with 40k on it hes getting around 17-19 mpgs. Kinda makes me want one, he gets the same mileage as my 7.3 but is way faster, o well i still love my truck