After you run out this tank of fuel, try the lowest grade regular that you can get from a name-brand station.
Premium fuel will not run as well in a low-compression engine as regular; and it is a wee bit more expensive.
Jon.
Good carburetion is fuelish hot air The most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes! The Carburetor Shop