Topaz Diesel Engine Oil Crystal 15W40 is a high-performance lubricant formulated specifically for diesel engines. Its advanced formula provides excellent protection against wear, corrosion, and oxidation, ensuring optimal engine performance and longevity. With its viscosity grade of 15W40, it offers reliable lubrication in a wide range of operating temperatures, promoting smooth engine operation even in harsh conditions. This oil is designed to meet or exceed the latest industry standards, guaranteeing compatibility with modern diesel engines. Its superior detergency and dispersancy properties help keep the engine clean, minimizing deposits and sludge buildup. Trust Topaz Diesel Engine Oil Crystal 15W40 to keep your diesel engine running smoothly and efficiently, mile after mile.