Originally Posted by Mark-G

Here is no real "Premium" or high octane number gas in Nor Cal...

I think this is due to regulations from State

Years ago we been able to buy "Sunoco" high octane gasoline from those "indy" gas stations, but no more.

I tried many stations with "Premium Gas" in CA (North Cal and SoCal) - never able to find anything even remotely close to gasoline you are getting in other states (NV/TX for example) - it's just not giving a "kick" to your engine like it's happens in other states...