Has anyone ever tried useing homemade distilled used oil in xjs yet or any other type of combustible?

I recently was stuck with no gas and had no dollar in my wallet. Since it worked in my lawn mower with a mixture of white camp fuel and gas stabilizer i got her running. Of course i ended up pouring some into my xj and it actually ran and consumed all 5 gallons i had . 2 month later i havnt had a problem no check engine lights or nothing. For some reason it actually had more milage per galon with the camp fuel.

im just curious if anyone else experimented with anything thats a liquid combustible.?