Ok thanks for the info i ran my YS110 today and wildcat 20/20 blend i put in 4ozs of caster and it seems to run ok but i am going to start using the COOL Power Heli 30% nitro blend again since i can get it at 1800 bucks a gallon versas 24 to 30 other places . The ys motors really love the cool power and the low viscosity oil especially the new Dingo. It and the Magnum is the only fuel i will use in the Dingo . If you use high viscosity oil it will dead stick as soon as you accerate from a idle in the air to fuel throttle allmost wrecka new Hangar nine Taylor craft because of a couple deadsteads with Other fuels such as Sig Heli and regular oiled fuels . I wont use any caster in the Dingo per Ys instructions for that motor . It is a whole new motor for ys and with the direct fuel injection and lower end being all different than any other four stroke. Thanks for the info Note the 4 ozs of caster was put into 2 gallons