This video shows a simple homemade lantern I made that runs on used motor oil. The tank is a Coca Cola can, the wick is steel wool extending into the fuel supply.In times of a natural disasters and the power goes out for days this will work out just fine. The oil lasts for a really long time. I would guess 50-100 hours. The wick gets carbon build up though, and needs to be cleaned out every few hours. I run straight oil. No diesel or kerosene added.