Rubber is used in a lot of consumer appliances, and industrial machinery. From automobile tires to shock absorbers, rubber is used a lot in the automobile industry. Footwear to industrial hoses, wire and cables are all rubber, and Rubber Processing Oil, exactly as the name suggests, is used in processing rubber. There are three types of RPOs, the Naphthenic Oils, Paraffinic Oils, and Aromatic Oils. The oil that is used is decided based on the molecular weight distribution and finished product.