Oil and tires

[Perfectlap]

Originally Posted by trimer

my mechanic after doing IMS used Motul 8100 X-Cess 5W/40 Synthetic (Porsche approved list*). Anyone else used or heard of?

Tony Callas recommended this oil in a recent'ish issue of Excellence Magazine. A reader and Boxster owner was switching from Mobil 1 and was asking about Castrol Edge.
Surprisingly they commended the switch away from Mobil 1 (surprising because Excellence need to get along with Porsche and Porsche need to get along with Mobil 1). Motul 8100 was one of the few oils Excellence felt offered enough ZDDP protection. Less ZDDP according to them, is one of the big culprits in an increase in engine issues that they are seeing in their shops.
In their opinion Mobil 1 and many others have been steadily lowering ZDDP to reduce cost which is probably why you see it on Wal-Mart shelves a lot more today than in the past. If engine oil is getting cheaper, there's usually a a bad reason for it since the price of crude is certainly not going down.