My two older brothers used to mix up their own fuel for their model aircraft and boats; they used a mixture of ether and castor oil (presumably after reading too many Biggles books!). The house used to smell of ether for days and mom got a very strange look when buying the castor oil in the quantities that my brothers needed.
Of course any lubricating oil would have served the purpose, but then Biggles would only use castor oil in his Sopwith Camel so that it didn’t emulsify at altitude. I don’t know how high my brothers thought they’d get! Happy days, now long gone.
I think I’ll ‘phone my brother and ask him, though!
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