The advantages of a waste oil burner are financial, environmental and practical. Waste oil burners are cheaper to run than other burners, as the fuel is cheaper to purchase. You are using waste oil, rather than new oil, to fuel your burner, and people are virtually giving it away. Also, using waste oil is more beneficial to the environment, as you are not using up new oil supplies, and are essentially recycling it. This also prevents it from being improperly disposed of by being poured down drains, clogging pipes and contaminating water supplies. Finally, they are good at heating rooms in your household, keeping you warm and cozy on cold winter nights.