I would guess with any make or model you can have some bad ones, however to say that there were no issues with the 6.0 would be irresponsible, and to say that oil leaks are to expected, not sure about that either. If we're expressing opinions I'll say the 6.0 was junk and this conclusion was reached after 5 oil leaks, 3 turbos and thirst for coolant, with less than 30k mileage and I might add that I know alot of guys with similar stories. I traded for a 6.4 and I must admit that I have a displeasure of that vehicle as well, oh the truck is great no problems whatsoever in 20k, just I have to assume that one of the fuel lines has a hole in it, because you surely couldn't put that much fuel through the motor. This thing is terrible, like I'm talking maybe if I'm lucky 8 mpg it has logged as low as 5 the high has been 9, these are hand calculated and its never hit the double digits. So now I'm contemplating getting rid of it for the 6.7, maybe I'll be as happy as I was with the 7.3, don't even suggest a chev or dodge not interested.