ORIGINAL: broncobill
When I run one of my nitros, I us O'Donnells 30% racing fuel. I burn that in a CV-RX 18 and a Sirio XL 27 Monster HP. That is the only fuel I have ever used.
Sirio .27XL... Now that's a high dollar engine.
Anyways, I used Wildcat 20% and Rocket Science 20% but currently use Blue Thunder 20%. I have an OS .18TZ, STS D28M, and 3 NS K4.6 engines. I noticed that my engines are harder to start and warm up on Rocket Science. Wildcat and Blue Thunder are cheaper blends, but since I only bash, I'm not picky about the fuel. If I were to race, I would go back to Rocket Science since that blend is meant more for racers. I would also try O'Donnels and Byrons as well.