Motor Oil Containers (Empty) Garbage Bin Do Not Store Other Chemicals in Empties Adding other chemicals into an empty motor oil bottle is dangerous. You can inadvertently create toxic byproducts when the chemicals mix with the motor oil residue. Did You Know? What Happens to Recycled Motor Oil Used motor oil can be cleaned and recycled, which helps keep it out of waterways. Recycled oil is then used to make heating oil, asphalt and other petroleum-based products; it is usually not recycled and resold as motor oil.