Quote:
Originally Posted by zrayr
zinc & phosphorous levels for all Mobil 1 oil products:
http://www.mobiloil.com/USA-English/...duct_Guide.pdf
I was not referring to an average engine, but a vintage 289 flat tappet mechanical cam engine. The kind most vulnerable to an insufficient amount of zddp. Therefore the lack of measurable wear is an indication that sufficient lubrication is present. Not fact, or proof, but definitely an indication.
Z
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Check out the Mobil 1 Racing Oils (page 2 bottom), if I'm not mistaken those 2 have the highest ZDDP content of any oils discussed so far? If so, and the ZDDP ppm count is the sum total of this debate - I would say the discussion is over (unless you decide to mix you're own).