I have a 6.0 that was a county truck (EMS) got it with 150K, have 180K now, before I purchased from the county the truck was 100% stock and maintained by Ford, they replaced the head gaskets and reprogrammed the ECU at 130K as a ford/fleet advised service. The Truck has been flawless since then, and am hoping it will go another 100K for me. I do not have studs, or a delete.. Change the oil every 5K, stay on top of fuel filters, and throw in some archoil every change, and do not hotrod the truck and I think the 6.0 can be reliable. I was very turned off by all the bad out there on the 6.0 but if you look hard enough you'll realize most of the issues with the 6.0 are in trucks with engine work ect.. there is as much good as bad out there, the bad is very vocal and can be found with a simple search.. just my 2 cents as a fellow 6.0 owner. tons of power an 20+ MPG on the highway.. cant complain.