Can I assume that too much of anything is not good? So much jargon going on about our muscle car engines with flat tappet cams not having enough zinc and phosphorus, make me wonder if one can add too much additive to their oils bringing the numbers too high? What is the optimim zinc levels? I assume that whatever the zinc is, phosphorus would be 100-200ppm less? No more, no less? What also confuses me is the talk from all these oil mfg's saying that the zinc and phos levels are only a part of the equation and that our special formulas allow those number to be a little lower yet our oil properly protects your flat cam. Is there an optimum zinc level? 1200-1500?