So I bought the Michelin CC2 and I dunno - did I make a mistake

[SoccerMan94043]

Note the statement in the upper yellow section.
Then go to your owner's manual on the My Porsche app. You probably will have to download it. Then in search box put in tire pressure and pick "tire pressure tables" from the choices. There you will see all the settings for the different sizes, tire type and choices of partial load or full load. The online manual shows them lower than what's on my door plate for "full load." If I have three to four passengers and their stuff then I'm at full load. Otherwise 98% of the time I'm at partial load.

I'm aware... I run right between the loaded and unloaded values, though it's always random what I'll get back from service.

Also note, I use the bulletin on it rather than the manual (they happen to be the same in my car's case).

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[4thPcar]

Well everyone I am finally a happy camper. I replaced the the CC2 tires with Pilot Sport 4 and then had them reduce the air pressure to 35 front, 33 rear PSI per the partial load advice in the online owner's manual. Immediately I could tell a difference in handling. Pity the warranty is for only 10K miles but I don't drive often and life is too short to drive on substandard tires!