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Brucelee · 03-26-2007, 09:42 AM

Oil viscosity is a complex subject.

In theory, you want just enough oil film and volume to avoid metal to metal contact and to cool the engine. Too much viscosity and you waste fuel and lose a bit of power.

Too little and you have premature wear or worse.

The 20W-50 MIGHT make sense in some applications but certainly not for Boxster street use.

03-26-2007, 09:42 AM	#19
Brucelee Registered User Join Date: Jun 2004 Location: Des Moines, IA Posts: 8,083	Oil viscosity is a complex subject. In theory, you want just enough oil film and volume to avoid metal to metal contact and to cool the engine. Too much viscosity and you waste fuel and lose a bit of power. Too little and you have premature wear or worse. The 20W-50 MIGHT make sense in some applications but certainly not for Boxster street use. __________________ Rich Belloff