It doesnt need any fuel different from what the engine uses. Run 87, NOS runs 87. Doing otherwise can really mess up the tuneup. Some may say it's extra precaution. Everyone I know that runs it (including me in my past) says it messes up the tune and can cause issues. I've run it on NA bikes (8.60s@185... no wheelie bar), big turbo bikes, cars, and trucks.