I am using a semi-synthetic oil in my car based on oil analysis ( many samples ) and Jake reviewing those samples . I will stay with the Wix # 51348 . But my engine is far from stock so your results may vary 
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2002 Boxster S Arctic Silver with black top with glass window and black leather interior. Jake Raby 3.6 SS ( the beast ) with IMS Solution. 996 GT3 front bumper , GT3 rocker covers and GT3TEK rear diffuser and Joe Toth composites rear ducktail spoiler .
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