Hello All
   
     Has anybody noticed that by switching to a fuel that has a large amount of synthetic oil in the mix that the internal parts of the engine had been cleaned of carbon and other undesirable deposits?  If so, what oil removed the deposits?

                                                                                                                                                Tia,

                                                                                                                                                Frank McCune

 with our team race diesels we normally use 10% caster in our fuel  .we have to clean the piston and liner  about every 300 laps

this year at the team trials i used 8% caster  ,2% caster 927, and 2 % automotive caster Edge seaSAE 5w-30US , it stayed so clean that it was hard to start with out a big prop each time it cooled off . the piston was spotless.  went back to all caster , the piston got dark and cold starting became easier .had to go back to cleaning the piston every 300 laps

Used some fuel ' suitable for all OS engines , rewally cleaned them up . even with castor thrown in .

A few flights And was close to death on OS 35S es . Definately Delacquered them . V close to ' picking up '

Id only use say 3 % Syn . in old Iron / steel suckers , on 20 % castor .

Ringed Dual Ball race will take it ( Syn . )

Took a bit of running ( on castor ) for Cranks to ' come right ' too . felt funny / Dry .