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Join Date: Apr 2002
Location: Houston (Clearlake), TX
Posts: 8,717
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I can't find anywhere that Castrol posts the numbers. Even their product data sheets with a line for zinc don't list the content. I wouldn't use it until you know for sure, besides Castrol is owned by BP... I'm just sayin.
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2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)
Old 05-17-2010, 10:42 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)