When my engine ran at motoroil, there is still motoroil out of exhaust. Not burned together with kerosene/gasoline. When i mixed the kerosene and castor oil, it can not mix, then i added a bit Klotz Benol castor oil, it will mix castor oil and kerosene togheter. Next time i will take a test with castor oil in kerosene/gasoline fuel and take a movie of the engine running with castor oil.

And gasoline is not so dry as methanol or ether there is still lubrication properties in gasoline. Nothing to be worried