KIXX Dynamic Silver API CF-4 SAE 20W-40 by GS Caltex is a dependable heavy-duty diesel engine oil formulated to provide effective protection, durability, and stable performance for diesel engines operating under normal to moderately severe conditions. Meeting API CF-4 specifications, this oil is suitable for high-speed, four-stroke diesel engines, including turbocharged and naturally aspirated models. Blended with quality base oils and a balanced additive package, KIXX Dynamic Silver offers reliable resistance to wear, oxidation, and deposit formation. Its 20W-40 viscosity grade provides strong oil film strength and stable lubrication at higher ambient temperatures, making it well-suited for operations in warm and demanding environments. Applications: Trucks, buses, and commercial diesel vehicles Turbocharged and naturally aspirated diesel engines Construction, agricultural, and industrial equipment Recommended for engines requiring API CF-4 performance level