RE: Nitro Fuel For RC Helicopters
I fly off a field at 750 meters asl. I've run my TT46ProH in my Raptor 50 on everything from 15% up to 30% nitro, and for my style of flying I've found I don't need anything above 23% nitro so I save my money. I also get about 12 minutes flight time from a fill up (including header tank) but I am personally ready to stop normally before the fuel stops me flying.
Minimum 18% oil is a must though. As already stated, car fuel doesn't have enough oil.