HPI power fuel is the best fuel I have ever used, bar NONE, and I have used almost every fuel available at one time or another.
It burns cleaner, runs cooler, and lubriactes much better IMO.
O'Donnel RTR blend is descent, but IMO it still runs hotter, and requires a richer needle settings that most other fuels.
Sidewinder is ok, but its a little low on oil for my taste. I like running 14% oil content, and 20% Nitro.