I have an 07 5.9, has 180.000K and I have no complaints. Bought the truck new, well maintained and the only problem I had was a faulty security module. One u joint in the rear shaft, and the two u joints in the front steer axel. I get about 14 mpg around town and about 21mpg on the highway. I have kept the truck all stock and rust proofed every year.