I have a 6.0 Powerstroke that I bought new in 2006. I waited until late in the model year before I bought it because of all the issues being reported about the 6.0 liter. It ran great for the first 95,000 miles. I towed my 14,000 lb fifth wheel all over the lower 48 with no issues. As soon as it hit 95,000 miles the problems started. Most of them are a result of a poorly designed engine oil cooler that uses engine coolant to cool the oil. It gets clogged with casting sand from the block and causes a whole series of cascading failures. The truck is in the shop right now getting new head studs (a known issue), and fixing many of those known issues that Ford elected not to tell the customers about. The estimate for this repair is around $7,000. I've driven fords for 35 years and have always sworn by them. This is the first one I've had problems with and they only happened after owning the truck for 8 years.