For over 65 years, Penray has manufactured quality chemicals for the automotive, heavy-duty and marine industries that are sp ... ecifically engineered to help keep your vehicle performing at its very best. Our superior technology, customer support and product training help you go the extra distance! Penray is truly an American success story. From modest beginnings in 1951, the privately-held company has grown to be an industry leader with two manufacturing facilities in Illinois. Penray products are developed, blended, tested, manufactured and packaged in these two U.S. facilities. Sales and marketing, working with staff chemists, develop creative solutions to solve complex issues found by today’s technicians. read more