[sittingmongoose]

Originally Posted by Sarg33

Yes, I run 93 unless I am on a trip and unable to find it then I run 91.

And FYSA, 91 or higher octane is not a "recommendation" from BMW, it is a requirement for proper engine function.

BMW recommending a 'BRAND' of tire or fuel is not a requirement for proper vehicle/engine function.

Wait wtf? Why would anyone want to run this car below 91!?!? This was a stupid argument. You're right it's required for the car to run well.

[richard in NC]

Originally Posted by Transfer

Meh I bought whatever Pilot Sport 4S is 265/40/21 and the Benz version that is 295/35/21. If you're referring to the Michelin Pilot 4 SUV, that is an entirely different tire altogether and there is no "star" version of that tire.

Yes and no. The Pilot Sport 4 SUV is a tire Michelin developed for performance SUVs. Intended for higher profiles and higher load ratings yet still a max performance summer like the MP4S. There's no star rating because the tire is new and BMW had special requirements during X3M development with the MP4S.

But the two questions are still not answered:
Why has there never been a MP4S in the factory 20" size?
Why does the MP4 SUV have a much lower UTQG treadwear rating?

We can be at least thankful Michelin offers the MP4 SUV in the factory 20" size so we don't suffer through Conti's or P Zeros again once they wear out.