Penray

Professional-Strength Chemical Solutions Since 1951

For more than seven decades, Penray has been a trusted name in automotive chemical solutions, delivering professional-grade products designed to maximize vehicle performance and extend service life. Founded in 1951 and manufacturing in Illinois facilities, Penray has built its reputation on innovative chemistry backed by in-house degreed chemists who work directly with professional technicians to develop products that meet the demanding standards of repair shops, fleets, and automotive professionals.

Comprehensive Product Engineering

Penray's extensive product line encompasses over 150 specialized formulations ranging from fuel additives and oil treatments to brake cleaners, lubricants, and functional fluids. Each product is rigorously tested and engineered specifically for professional maintenance and repair technicians who require reliable, consistent results. The company's comprehensive approach means shops can streamline their inventory with a single trusted brand covering fuel system treatments, cooling system maintenance, power steering fluids, transmission flush kits, and seasonal winter protection products.

Innovation in Cooling System Technology

Penray has earned particular recognition for its Pencool brand of engine coolants and supplemental coolant additives (SCAs), widely respected throughout the industry. The company's patented Need-Release cooling system filters represent a significant advancement in coolant maintenance technology, helping fleets and owner-operators extend service intervals to 150,000 miles while providing enhanced engine protection. This innovation allows operators to reduce coolant inventory complexity and simplify maintenance schedules with universal coolant solutions that eliminate the problems associated with mixing different coolant types.

Heavy-Duty and Diesel Expertise

Beyond passenger vehicles, Penray serves the heavy-duty truck and fleet markets with specialized diesel fuel treatments, including their Fuel Doctor program that provides expert fuel testing, analysis, and customized treatment plans. Their diesel fuel additives are engineered to address modern fuel quality challenges, restore cetane levels, improve lubricity, prevent injector plugging, and maintain optimal engine performance while maximizing fuel economy. The company's cold-weather product line protects diesel engines when temperatures drop below freezing, ensuring reliable operation in harsh conditions.

American Manufacturing and Quality Standards

All Penray products are developed, blended, tested, manufactured, and packaged in the company's two U.S. facilities, which incorporate lean manufacturing techniques for optimal efficiency and quality control. Acquired by PLZ Corporation in 2017, Penray benefits from the resources of a company that formulates and packages more than 2,500 branded and private label products. The brand maintains its commitment to operating in a safe, compliant, and environmentally friendly manner while offering formulations that meet all state and local environmental regulations.