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Brucelee · 01-08-2005, 05:15 AM

Sorry, Redcap is referring to Mobil 1 15W-50. This is the synthetic that was used by Porsche in the Box and 996 until they switched to recommending the Black Top, also know as Europeon brand 0W-40.

As you can see, the base stock vis of the two oils is very different and hence, the concern I have about running Black Top in hot weather.

You will get better gas mileage with the Black Top which is why many manufacturers go that route. However, for M cars, BMW recommends Castrol 20-60, so they must have some concerns about how well the lighter oils hold up in performance autos.

01-08-2005, 05:15 AM	#9
Brucelee Registered User Join Date: Jun 2004 Location: Des Moines, IA Posts: 8,083	Sorry, Redcap is referring to Mobil 1 15W-50. This is the synthetic that was used by Porsche in the Box and 996 until they switched to recommending the Black Top, also know as Europeon brand 0W-40. As you can see, the base stock vis of the two oils is very different and hence, the concern I have about running Black Top in hot weather. You will get better gas mileage with the Black Top which is why many manufacturers go that route. However, for M cars, BMW recommends Castrol 20-60, so they must have some concerns about how well the lighter oils hold up in performance autos. __________________ Rich Belloff