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jmatta · 08-06-2009, 05:13 AM

I second Castrol Syntec 10W40...I've used it, though my usually flavor is Royal Purple (the Castrol is probably just as good and half the cost). xW50 weight oil is fine for warm/hot weather, but I wouldn't run it in winter...too thick.

08-06-2009, 05:13 AM	#3
jmatta Registered User Join Date: Nov 2007 Location: Chicago suburbs Posts: 1,675	I second Castrol Syntec 10W40...I've used it, though my usually flavor is Royal Purple (the Castrol is probably just as good and half the cost). xW50 weight oil is fine for warm/hot weather, but I wouldn't run it in winter...too thick. __________________ JGM 2002 Boxster S 1973 911 Green FrankenMeanie PCA DE Instructor circa '95 Last edited by jmatta; 08-06-2009 at 05:17 AM.