Seems there’s no specific reference to ‘Flat Tappet Cam’ engines, perhaps this is assumed. With air cooled vw engines this is a big concern requiring high zinc levels. I would like to know if there is a synthetic oil with low or no zinc and combine it with an anti friction additive so a catalytic converter can be added. I don’t want the pollution coming out the back of my car, primarily for the environment but also for anyone driving behind me! I hate being stuck behind an old car getting gassed out!!! We need to change our ways to help the earth while enjoying our classics! I know there will always be those people that think they are too cool for school and run straight pipes, but most of us are more evolved and should find a better way!
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