Synthetics are usually based on Castor oil, from Castor beans; presumably the same processes could take olive oil as a feed stock. Using it bare would probably

Synthetics are usually based on Castor oil, from Castor beans; presumably the same processes could take olive oil as a feed stock. Using it bare would probably gum up the engine once it got too hot. In a similarly silly vein: you can use Pepto-Bismol as brake fluid, and it can help show recent leaks with the color difference. It can even clog some pinhole leaks all on its own, it crusts as it dries. Its not a good idea, but it might be better than trying to drive a car with no brakes at all. https://en.wikipedia.org/wiki/Castor_oil https://en.wikipedia.org/wiki/Castor_oil