We are a company that owns 4 7.3s, 2 6.0s and one 6.4, and a cummins. The 6.0s have been a problem. I have a full time mechanic to work on our heavy equipment, and he has made the 6.0s his pet project. We have replaced on both trucks, the high pressure oil pump and filter, pistons and rings (both had broken rings) heads, both were cracked, one with ford heads and one with fire ring remans, head studs, turbos, one twice because a high performance one from innovative failed, egr delete, injectors, one twice because it is too long a wait to get aftermarket injectors when they fail, and installed bypass oil filters(I like these, we run synthetic oil, still looks new a 5000 miles.) Both trucks needed to be done @ 150,000 miles. SCT tuners set to heavy tow. One truck ran a year on the innovative extreme street tune and when we tore the engine down all cylinders had head gasket problems and the oil pan was heavy with what we think was soot, we think too much boost. We think the problem starts with the junk plastic screen in the factory hpop. If this works, and we fixed them to some kind of reliability, we will buy the cheap ones people are tired of fixing and put them in the fleet. Question: Are they fixed, or are we going to continue with problems?