
04-21-2009, 05:21 PM
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CC Member
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Join Date: Sep 2006
Cobra Make, Engine:
Posts: 343
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Not Ranked
Joe Gibbs XP4
This may be a little off topic but I currently run the XP4 oil in my 427W. It was recommended by my engine builder (Eric @ Performance Engineering). It is a 10-50. Do you guys have any thoughts on this oil.
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