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.