Used oil is very much burned for heat. Common for shops in areas that need heat in the winter to have a "waste oil heater" instead of using utility gas or elect

Used oil is very much burned for heat. Common for shops in areas that need heat in the winter to have a "waste oil heater" instead of using utility gas or electricity for heat. https://www.energylogic.com/waste-oil-heaters/ https://www.energylogic.com/waste-oil-heaters/