Well said wdk450, I paid $20,000 for my high millage 2005 F250 2 1/2 years ago and so far the truck has been a great performer. The new clean diesel now available, has solved most injector problems. But I also had great service with my previous 6.5L GM Diesel. Just PM Maintenance in 9 years of ownership. I stay away from the service deptments and do all my preventive maintenance. Its always to late, waiting for warranty services. I was in Maintenance Supervision all my life, and the best of equipments, including Cummins Engines needed preventive maintenance. In addition, the 6.0L has 2 fuel filters, I change the lower filter 1st and wait a few miles before changing the top filter, that way the top filter will catch all the dirt disturbed by the lower filter change, then the new filter is much cleaner, never failed me so far. On the GM I would change the filter when the pump pressure would drop. But I did check the pressure and drain the filter often. PM, PM, PM is what is required.