91 is the highest you can get that's widely available in California. And it's all I would put in the car. Why would you buy a $60-80K car with a fancy turbo engine and then put gas in it that would force the computer to lower your performance? 91+ only. If I could get 93, that's what I would put in the car.
I guess I can. Go to VIP fuels in Pacific Beach and pay $8/gal for 100LL race gas. But that's a little inconvenient for me.
