You can get the 100 octane on Speedway near ( I think it's Country club) THere's an Eegee's on the corner and the 76 right there has it. Noone has 93 here, though. You gotta mix 3 gallons of 100 to 7 gallons of 91 to make 93. That's cuz the 100 octane is like $5 a gallon, and unless you ballin you don't fill up with it.