Chevron Oronite Company's additives subtract the bad elements from oil and other fuels. Oronite additives disperse deposits, control corrosion, and execute oxidation, thereby reducing wear and friction in fuel-burning engines. The company is a subsidiary of Chevron and affiliated with its chemical joint venture, CP Chem. Its products are divided into components and chemicals (detergents, dispersants, polybutene), fuel additives (gasoline, diesel, and aftermarket additives), and lubricant additives (hydraulic, engine, industrial, and marine oils). Among its fuel additive products is the viscosity index improver sold under the brand name PARATONE.