Bass1, I only use Powermaster fuels. I think they are by far the best.

I use YS blend 20% nitro and 20% all synthetic oil. I have also used 30% nitro and 23% low viscosity all synthetic Heli blend also. The 30% REALLY runs good but is a bit expensive. The 20% is good also just not as much power as the 30%.

The 30% will get you about 400 to 500 rpm more than the 20%.

I have been using the 20% in all of my glow engines. It is just great fuel.

Happy flying!