I spoke to a friend of mine lest night, and just a couple of starts after changing to diesel oil, he has wiped his cam. The motor is a 400 punched and stroked to a 451? i think, and it does have a ~.600" cam w/ solid lifters...non-roller. He had the Valvoline VR Racing oil in it and changed it to the diesel oil because he couldn't find the VR. He has not driven the car since the change, just started it 2-3 times since changing the oil. After the new oil, it started sounding funny. He checked valve lash and one was really loose. He's going to switch over to a roller setup so he doesn't have to screw with this oil mess anymore. He called the cam manufacturer and they said they continue to have issues w/ the new oils, and the zinc in the diesel oils is going to be reduced even more soon. Time to stock up in the VR when you can find it I guess! -- Bill M 65 Coronet 500 'vert http://1962to1965mopar.ornocar.com/mmo62008.html 73 Dart Sport, 00 Cherokee, 01 Dakota