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Trey T · 03-28-2014, 07:34 AM

I'm switching to all full-synthetic on all my cars and use either Castrol or M1. For the boxster I either use M1 0w40 or Castrol 5w40 to change out every ~6 months or ~6K miles. Finding those oil on sale has been easy.

03-28-2014, 07:34 AM	#4
Trey T Registered User Join Date: Dec 2009 Location: Texas Posts: 244	I'm switching to all full-synthetic on all my cars and use either Castrol or M1. For the boxster I either use M1 0w40 or Castrol 5w40 to change out every ~6 months or ~6K miles. Finding those oil on sale has been easy.