wdave,

I've run CP 30% Heli fuel which is low viscosity, and the Magnum YS/DZ branded stuff, i've seen no difference in the fuels and CP is the cheapest and I can pick up local.

The DZ smokes a lot almost like a Heli motor so don't worry about all the smoke, it leave a nice contrail while you are flying...almost like have a smoke system.

If you have any questions regarding the motor, just post a thread in the engine support forum as there are a few guys who have a ton of exp with them..very helpfull.