Waste oil recycling in Kheraj is offered by a number of companies. Oil recycling is done for motor oil, engine oil and cooking oil. The companies carry out a number of steps to recycle the oil, so that it can be reused. They use special filters to separate the waste from the oil. Waste oil recycling is environmental friendly, and facilitates the re-use of oil. Some of the companies do not accept oil that has been contaminated with water, solvents, antifreeze and other fluids. If the oil is contaminated, proper disposal is important as improperly disposed oil can affect the environment.