RE: fuel type for multiple models
i run 30% heli fuel in my helis, 15% heli fuel in my planes, and 30% heli fuel in my RC off road car. I could use 30% in all my aircraft, but I bought a lot of 15% and I want to burn it.
When that is gone, I'll be happy to buy 15% airplane for the airplanes and 30% heli for the helis.
For helicopter use, I would not run anything less than 18% oil content. If your fuel has this oil content, then no problem. If you don't know, better go with the fuel that is labeled "for Helicopter use".
Rafael