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Originally Posted by Paul
0w-40 M1 is fine for our cars. M1 has put different additives in the oil to replace the ZDDP. (from a tech session at the Porsche Parade in Keystone last week.)
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Yes, probably given by a sales person from Mobil. One of the Parade organizers asked me after the 356 Lit Meet earlier this year to do an oil talk like I've given to many clubs and at national events (I was on vacation, so I couldn't), but I wouldn't have since if I didn't have anything nice to say, so I was better off not saying anything at all. :-) Mobil was a sponsor for the Parade and it was implied that I had to play nice, and everyone knows what I think of the new Mobil 1 formulations.
Like I tell many I speak to, if you insist on running a Mobil 1 product, there's always the M1 10w40 4T Racing motorcycle formulation, that is closest in spec to what would have been used back in the late 90s when these engines were new (in respect to Zn and P). You could even run a 50/50 blend with the m1 0w40 and motorcycle oil if you wanted, that's what's in our Boxster now. Can't wait to see the used oil results.