Who are the buyers of used transformer oil?

Buyers of used transformer oil typically include companies that specialize in oil recycling and re-refining, as well as industrial waste management firms. Some transformer manufacturers or maintenance companies may also purchase used oil for reconditioning or proper disposal. Additionally, certain industries that use oil for non-critical applications might purchase recycled transformer oil. However, due to environmental regulations, the sale and disposal of used transformer oil must comply with local laws and standards, especially if the oil contains contaminants like PCBs.