626gn
Well-Known Member
- Joined
- Feb 15, 2009
Is adding a bottle of ZDDP still recommended if you have a billet roller cam & lifters? I’ve done a search and read comments from both sides but haven’t found a definitive answer. I’m leaning towards using it since I have a few bottles laying around anyway but I recall reading a couple posts advising against it. I don’t see what harm it could do but just want to make sure…