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Any airport for light civilian craft has all the 100 octane non ethanol gas you want. Use it as an additive with the best local pump gas you can find and you should be good to go, as well as a lot more economical than additives.. A little late for your motor now, sorry.



In this day of security concerns at airports I wonder if one can just ride right up to airfield AV GAS pumps...as a general rule, I would think not.

Lucas Octane boost would be a reasonable alternative.