Break in oils, zinc and all that jazz
Ok....I have a question....I understand about the need of zinc in older flat tappet cam engines and not needing it in a roller cam type setup...Now my question is lets say a 1998 Nissan ( I kno it ain Mopar don't shoot...lol) Altima 4 cyl with an overhead cam uses a cam an bucket style lifters/plungers/followers...Any way I know it's not a roller between the cam an lifter....Why is it that those engines don't need the zinc additive even though it's not a roller lifter style?
