The Penray Companies, Inc. manufactures liquids and aerosol products. It offers cooling system products; and fuel and winter products, such as winter fuel treatments, cold weather products, emergency diesel fuel treatments, winter fuel treatments, and year round fuel treatments. The company also provides appearance products, cooling system products, fuel system additives and cleaning products, functional fluids, installer product kits, installer products equipment, maintenance products, products for industry, service products, shipping information, and specialty items; fuel and oil additives, functional fluids, maintenance products, and tire care products; and antifreeze inhibitors. In addition, it offers marine products, including diesel fuel conditioners, off-line cooling system cleaners, and two-way test strips. The Penray Companies serves heavy duty diesel engines, light/medium duty engines, marine, off-road equipment, automotive, and hardware industries in the United States and internationally. The company was founded in 1950 and is based in Wheeling, Illinois.