Thread: Anyone Use Royal Purple Break in Oil?
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Old 08-04-2009, 02:07 AM   #5
fee5fofum
 
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Drives: 2012 CTS-V Coupe & 2SS/RS
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Found this on GM Performace Site on break in period , look at FAQ #8 :
http://www.gmperformanceparts.com/Parts/faq.jsp#faq6
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