DELO SILVER (SAE-50)-4L is a dependable heavy-duty engine oil designed for diesel and gasoline engines requiring API CF or SF performance. Its proven anti-wear additives form a protective layer to reduce wear, while metallic detergents and dispersants prevent high-temperature deposits, sludge, and oil thickening. With strong oxidation stability and consistent performance, it preserves engine power and extends service life—ideal for mixed fleets, commercial transport, off-highway equipment, agriculture, marine engines, generators, and suitable hydraulic systems.