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Registered
Join Date: Dec 2002
Location: Dahlonega , Georgia
Posts: 16,096
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Heat shear is a killer of motor oil . I have two water cooled Porsche's and would never run 0w40 . I have been running 5w40 for years and after I use up my stash I will move up to 50w . I am pretty sure I will go with 15w50 as that weight is " generally " shear stable . I am in north Georgia and drive mountain roads at a good pace . Oil temps really climb on a 90 + degree day .
Let's not forget that mother Porsche is now recommending 5w50 for 986/996 engines . I won't go down the rabbit hole of what brand of oil to use . I would suggest pick a brand and do a VOA . Then do a UOA after 3,000 miles . The data will tell you all you need to know about your brand of oil choice . Alter brands as needed and let the data be your guide .
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2002 Boxster S . Arctic silver + black top/int. Jake Raby 3.6 SS engine " the beast ". GT3 front bumper, GT3 side skirts and GT3 TEK rear diffuser. 1999 996 C4 coupe black/grey with FSI 3.8 engine . Rear diffuser , front spoiler lip with ducktail spoiler .
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