Here's the scoop. Had the truck out yesterday. (2004 F550 6.0L 6spd 4x4) I shut the damn thing off to go shut down some stuff I was doing and it won't start back up 10 minutes later. After 2 hours, it starts and runs like it's usual self (whole other story). Apparently, the oil gets too thin at operating temp and blows by the seals in the high pressure oil system for the injectors. Got it to the mechanics, and for once, it actually acted up in front of him. So the problem can be duplicated. Anyone else ever had or heard of this being a problem? It acts up after every oil change, too.