High-zinc oil or ZDDP oil additives?

fishmens67 said

This ! and if your engine is sealed and finely tuned like mine, the vr1 will be clean at the next oil change. I have used Valvoline exclusively for 40 years, with no failure at high rpm racing and street use.

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And this is exactly my point. It's not wrong, it's just he has never tested anything else. So how would you know if something is better or not?

Not knocking fishmens67 I'm just saying you can't possibly KNOW that you are using the best if you have not done TESTING.

It really comes down to that. And unicorns and pixie dust with a little voodoo juju thrown in.