Used cooking oil.
Recycle base oil.
Waste engine oil.
Used oil.
Used engine oil.
Used engine oil.
Used cooking oil.
Used engine oil (UMO), new antifreeze, burner oil.
Used-cooking-oil.
Used cooking oils.
UCO used cooking oil.
Used cooking oil.
Used cooking oil (UCO).
Used transformer oil.
Used oil.
Used engine oil.
Used cooking oil.
Used cooking oil.
Waste/used engine oil.
Used cooking oil.