Zinc Rich Oil for Flat Tappet Cams

RustyRatRod said
A lot of articles say once the cam and lifters are successfully broken in, the ZDDP is not critical. I disagree, because most of the time anyone concerned with such, has a better than stock cam with higher spring pressures. I think in those instances, it is certainly beneficial to continue the use of ZDDP. I know I have and I will continue to do so, regardless of anyone else's opinion.

QuickDart360 said
Those articles about flat tappet cams are written by kids right out of college. Probably never new what a real hot rod is!! Especially one with a hydraulic or solid tappet cam. Their info is useless.

I like the factory owner manual reccomendation on viscosity, but it’s more of a bearing manufacturer thing after a rebuild. I have to wonder what additional additives the Mopar sperm oil additive recommended by ChryCo for severe and performance usage had. Of course, at the time, oil was still made for cars built in 1971 in 1971!