Originally Posted by CynicalCS84

Anyone? I don't even care what it costs. These cars are pigs on 91. Any help appreciated.

Originally Posted by pete

Incorrect, the AKI for California fuels is 91 octane, we just have a different blend with some additives. The knock index is the same and will function the same way with that regard (I don't know who thought that CAL91 == Others89), all this stuff is carefully monitored by the state to make sure we don't get shammed by gas pump owners.

BTW: As far as I remember, we lost the higher octane stuff in Cali not due to CARB, but actually because an oil company was stupid and sued itself or something like that.