I have a Jaguar that also requires premium. Bought it new 5 yrs ago and have never used it. I go to the dollar store and buy a bunch of bottles of octane booster. Put one in before every fill up. Never once heard a ping or could tell any difference. Has saved me a ton of money.
That’s one solution. We have pure gas (no ethanol) at one station in Pocatello. Not available in San Diego :-( Thanks for the pointer. It may provide a viable alternative if premium becomes unavailable.