Penray

Penray: Over 70 Years of Innovative Chemical Solutions

Since 1951, Penray has been one of the most trusted names in aftermarket chemical solutions, serving automotive, heavy-duty, marine, and industrial markets with equal dedication. Founded in Wheeling, Illinois, this privately held American company has grown from modest beginnings into an industry leader with two manufacturing facilities in the state — a testament to its commitment to domestic quality.

What sets Penray apart from the competition is the depth of in-house expertise behind every product. Staff chemists with real-world input from professional technicians develop, blend, test, and package each formula on U.S. soil. The result is a lineup of chemicals that professionals in more than 20 countries rely on to keep vehicles and equipment running reliably, season after season.

Penray's catalog spans well over 150 automotive products alone, covering everything from aerosols to functional fluids to maintenance service kits. Their fuel additives are among the brand's most recognized offerings, tackling real-world challenges like injector fouling, fuel degradation, and cold-weather diesel gelling. For technicians dealing with stubborn deposit buildup, Penray's fuel system cleaners are formulated specifically to address modern direct-injection (GDI) systems as well as conventional gasoline and diesel setups.

Beyond the fuel system, Penray brings the same chemistry-first approach to general maintenance. Their multi-purpose lubricants are designed to clean, protect, and extend the service life of a wide range of components, while their specialized chain lubricants — formulated with a high concentration of Moly-Sulfide and a tackiness agent — deliver tenacious lubrication even under high-velocity chain drive conditions. When cold temperatures make hard starts a genuine concern, Penray's starting fluids are engineered to reliably fire gasoline and diesel engines down to extreme temperatures, with built-in upper cylinder lubrication to reduce wear on starters and engine components during the process.

In 2017, Penray was acquired by PLZ Corp., expanding its manufacturing and distribution capabilities while preserving the brand's core commitment to quality chemistry. Whether you're a fleet manager maintaining heavy-duty trucks, a marine technician servicing outboard engines, or an automotive professional seeking reliable service chemicals, Penray's broad product range continues to deliver solutions built on more than seven decades of formulation expertise.