I knew a carnie who had a car that ran on biodiesel, she usually would hit up local restaurants and ask if she could use their waste cooking oil (the stuff is usually kept in black containers outside that they have to pay to have emptied on occasion). I don’t know what processing (if any) she had to do to make the waste cooking oil able to be used for her car.

She had bushy armpit hair and liked to wear overalls, and now I wonder what I’m doing with my life and why I’m not a roving carnie using restaurant oil for fuel 🤔