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Originally Posted by Brucelee
Try engine or motor oil for a search.
M1 or Red Line are both GREAT oil.
The 0W-40 or 5W-40 (in the case of Red Line) are fine for all but racing applications.
Most of us DO NOT subscribe to Porsche's rec of 15 or 20K miles change intervals.
Try 7500 for a longer lived engines.
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I totally agree with Brucelee -- I'll be ordering my 07 Box S soon (my first Porsche) and will not be following their 20K oil change interval (will do the 7.5K). I currently use M1 0W-40 in my 03 Mercedes E320 and its computer tells me to change oil at approx 15K. An oil analysis indicated that the TBN was at 2.7 after 15K. I would expect the TBN to fall dangerously below 2.0 after running 20K, not to mention that the viscousity will thicken.
BTW, Blackstone labs (
http://www.blackstone-labs.com) has a link to an article where a couple of guys did a comparision of M1 and Amsoil -- it's a good read. Also, M1 is a Group 4 synthetic (PAO base) while Redline is Group 5 (POE), and Castrol Syntec is a Group 3 (hydrocracked) which is the cheapest synthetic.
Please don't ask me any questions -- I'm not an oil expert -- I read about this stuff on
http://www.bobistheoilguy.com oil forum where there are professional oil people.
This is a great forum -- the MB forums are depressing with everyone complaining about the lousy quality the MB's are these days.
Regards,
paul...