The motor only has 152k miles on it. The head gasket was replaced by me in september of '11. I had the head cleaned and pressure tested, and while it was off, I looked at the cylinders, and they barely looked worn at all, i could still see the crosshatching on the cyl. walls, and there were no vertical wear marks. I put 24k miles on the truck, with regular LOF's, and it didn't burn any oil, and didn't smoke at all.