318 Oil Question
The Delo is a good oil you will be fine using it. But I must tell you after next year ('07) the diesel oils won't have the zinc package that all of you are using them for. They have to go to a low ash low emissions formula like the gasoline oil. The '07 and later diesel engines have particulate filters and emissions controls on them and the old oil will clog them up. So after '07 diesel oil won't have the ZDDP package either. You'll need to find a non-emission racing oil or use the GM additive. I have been using Brad Penn Oil in my Duster this past year and it is great. Brad Penn bought the old Kendall refinery and bought the formulation. It even has the green tint that the onld Kendall GT-1 had.
http://www.bradpennracing.com/