I like the stuff from Cooper fuels... it's 10% nitro and 20% oil.... Send a PM to Fuelman and see if he can hook you up... If you can't get that, get some Byron's 10% nitro/ 20% oil.... The run much better with 20% oil... The lower nitro helps em run cooler.

That cool power stuff is all synthetic... No castor.. I don't like it very much.