Good info on oil posted by sdhsbaseball on May 01, 2013 at 03:32 PM
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It may not be apples to apples, but how would they explain the ability of Freightliner trucks to run 500K miles on a motor with extended oil changes that run at 100% engine capacity at every hill and acceleration?
Their basis is totally on the ZDDP levels and additives. One could simply add ZDDP Plus to get to levels the same as the race oils.