
07-16-2011, 03:48 PM
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CC Member
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Join Date: Sep 2008
Cobra Make, Engine: csx4163 full comp alu. body
Posts: 368
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Not Ranked
Old thread went into more detail. Might be under lead being reduced in most oil. Was a big concern with ZO6 corvette which uses Mobil one. I go on corvette forum all time since I have ZO6. Joe Gibbs, Brad Penn, Valvoline racing, all ok.
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