I'll see if the LHS will order me some of the all castor C/L fuel from sig or fox. I don't want to shorten the life of this engine, besides I have two newer fox .40 lapped piston engines that I'd like to run some prior to flying. One of them, a BB R/C was given to me by a club member who could'nt get a good run out of it. It looks as though he ran it on syn fuel as there is no trace of castor any where on or in the engine. The piston/sleeve fit seems to be perfect, so maybe he did'nt run it long enough to cause any serious damage.

Mike