07-28-2010, 06:10 PM
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CC Member
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Join Date: Jun 2005
Cobra Make, Engine:
Posts: 3,077
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It is a slippery slope as to weather a hydraulic roller needs the extra zinc and phosphorous when it comes to performance engines. I wouldn't be concerned about your lexus ls 460 but a stroked small block or a flat tappet, I would have to error on the cautious side and get the zinc/phosphorous either by the oem or supplement.
Additives are consumed over time so theoretically an 800 ppm new oil may be the same as a 1200 ppm after 4K miles.
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