Fuel for Fox engines

I am a collector - and user - of all kinds of vintage and antique engines including Fox, Veco, HP and HB, older K & B, etc. and I have never used castor oil based fuels in them. The metal in the pistons and cylinders and crankshafts just don't know what chemicals are in the fuel. Mostly all they need are good operating temperatures and a bit of slippiness, otherwise known as lubrication. Castor oil has large molecules and clump around even the slightest microscopic scratches, like lapping marks, and quickly burn. That familiar black gunge that forms is trying to tell us something and that is: please dont use stone-age vegetable oil in high speed engines!

All of my engines, even ones going back to the late 1940s are in spotless condition internally and externally with no rattling wear and tear. When tuning them I just feel the cylinder head frequently and if it is getting too hot to touch I open the needle a bit. Thats all you need to do. There may or may be a smoky exhaust trail if the needle setting is rich. That doesn't matter. Temperature is everything. There must be some validity in a fuel manufacturer spending a fortune in research and development in synthetic ingredients. It would be so much simpler to just use castor and extoll its qualities. I use Morgan Cool Power Green 5% for ALL my engines, vintage, plain and ball-raced, 2 and 4 stroke and have never had a problem. I have no connection with the firm and please guys, don't tell my engines as I am sure that they are glad not to be strangled then burnt by castor oil!

Harry Lime, Vienna.