Everything I have ever read said it does not matter whether the oil is synthetic or not. For a flat tappet engine you need the ZDDP. Every cam manufacturer I have seen a statement from agrees.
Right. Needed at break in is what I read they and Comp Cams are saying.
Rotella (?). Then syn. is will work.
I think the way I’m going to look at it is if I can’t get it at K-mart, do I really need it?
My engine is well broken in.
How much pressure do my stock springs have anyway?:bounce:
What's next, molybdenum disulfide?:scratch: