YS Performance actually recommends 30% nitro fuel for the best performance. I've used it almost
exclusively for the past year and YS engine love it. The only thing is maybe your fuel has a little
too much oil content as YS recommends 20% low viscosity oil , which the PowerMaster I'm using has ,
but I'm not sure what the Magnum fuel has.
I don't know if it was just me or the fuel but I tried Magnum - Cool Power 30% in my YS 1.10 and could
not get the engine to run right but it runs very good on PowerMaster 30%.

tommy s