Yeah, I wouldn't trust CA gas straight up in any sled I cared about, and I'm guessing getting good gas involves either going to NV or running expensive racing fuel or avgas. I'm lucky: you can find eth-free premium at most stations here in MT. If all I could get was blended, I'd follow the advice given of running 2-3 gallons of avgas or racing fuel per tank. I'm sure you could find more discussion on dealing with blended gas in the turbo section. Most important: whatever you do, make sure you're not giving them ammo to deny a warranty claim (hopefully not likely). They shouldn't give you any hassle mixing in some high octane fuel, but they might if you run it in eth-free mode with even a little blended fuel in the tank.