Ford has actually tried to Deny Warranty Work on mine and my dads '06 6.0l's because we are running Rotella 15-40 in them.. Ford says Motorcraft 10-30..
Also, My father is a firm beleiver in this.. On his ole 6.9/7.3 IDI's every other oil change he'd drain the oil, then put 3 gallons diesel fuel in run it for a few minutes, and drain...Help clean it out..Can this be done on the 7.3/6.0
PSD?