If you are going to drive a diesel a lot they are great normal maint. but they are not designed to sit or drive 50mi every other weekend then they need all kinds of maint. I say this as a retired truck driver, They are made for the long hall and if keep in good repair will run 2 or 3 hundred thousand miles with no problem. last truck I had was pushing 350000 miles and just regular maint. But you have to drive them! Only my exp.