ok have got an 06 w a 6.0 and i have had my high pressure oil pump go out 3 times on me...all covered at the dealer for 100 bucks but im about to be out of my 100k warranty so im worried that its gunna get expensive to fix.

i run royal purple 15w40 full synthetic oil and change it ever 4-5k (never more that 5500 bc im crazy)