Is anybody else besides me running non-castor fuel thru the K&B 61?

I just can't stand the burnt deposits from the castor.

What would you do to prevent the yukky build up when the engine is surrounded by the cowl and my tatone muffler isn't the tightest fitting / non leaking muffler.

Does anyone out there using the all synthetic stuff having any troubles compared to the castor users?????

root

p.s. got a 11x7 APC to try / compare w/ the wooden 11x7.5--- the Master air screw 11x7.5 is next on the list......