There's a lot of hoopla surrounding Zinc, ZDDP, etc... especially when it comes to breaking in new (non-stock) flat-tappet motors.

You can either take a class from a triboligist like Kevin McCartney, or just use what the manufacturer tells you to; simple as that. If you want to use something different, forget the SAE and ILSAC standards and look for ACEA certifications on the bottle.

Also, while bobistheoilguy.com has a lot of good info, it's not the end-all-be-all. If you really want to compare oils, just go to their websites and get the MSDS/tech sheets. You might also try out blackstone-labs.com and get your oil analyzed to see what's actually going on instead of just guessing.

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A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.