Originally Posted by
blacksnapon
My experience with the 6.0 and the 6.4 has taught me that fuel quality is a major contributor of failures in either diesel. Every problem that the 6.0 has, can be traced to fuel. Injectors (fuel pressure, scuffing) egr valves (sooting) turbos (sooting up, vanes sticking), head gaskets (turbo vanes sticking leading to overboost). Why else would there be sections of the country with problems galore, and others with literally none (like mine)? A major pipeline gets a load of poor quality fuel, from there, trucks carry it out 2-300 miles in all directions. Keep using fuel additives and your problems will be greatly reduced. Periodicly, get your fuel lab tested for cetane level. The 6.0 needs 40, and the 6.4 needs 45 (factory fill is 50). Betcha that areas with lots of problems are around 35.