There is alot of talk on what fuel to use in ys engines at our field.Some say add 3 oz of oil to the standard to 15% cool power,some say to use the fuel specifically for the ys.Such as 20/20.What is your opinion on this matter.I don't want to have to pack another type of fuel around with me. But I also don't want to ruin an engine.Thank you for any information.

First of all, 15% nitro fuel is not suitable for any YS engine. 20% nitro, 20% synthetic oil and the balance methanol is the recommended mix. The heli blends with low viscosity, high percentage oil packages also work extremely well. Cool Power 30% heli fuel is an example.

Whenever you add oil to an existing nitro percentage fuel, you also cut the nitro content. Better to add oil and nitro if you have to do it that way.

I am running CP 30% heli in my 110. Would I be just as fine using CP 20% Heli?

Chris

With a bit less performance it works just fine.