alright on a serious note. i just visited the local book store and picked up a book how to build chevy small block circle track racing engines and there is an article in there about diesel engine oils. comp cams did a lot of research on oils and flat tappet camshafts and came to the conclusion that many of the diesel engine oils have high pressure friction inhibitors as good or better than any of the previous automotive oils. oils to look for are ci-4 plus, ci-4, and cf-4. these oils should be used at least through the break-in period along with comp cams camshaft break-in lube
oil additive. there is also a short list of oils such as castrol tection extra 15-40, chevron delo, delvac 1300, and shell rotella.
just something to think about fwiw. i think the oils are now in the cg to ch range so things might have changed. book copyright 2007.