The TRUCKPRO SHELL ROTELLA SAE 40 CSFL heavy duty diesel engine oil is formulated specifically for heavy duty diesel engines, ensuring optimal performance. It offers exceptional wear protection to help even in demanding conditions. This oil provides excellent oxidation stability, contributing to a prolonged oil life. Advanced detergents in its formulation work by efficiently dispersing contaminants to keep engines clean. It is designed with enhanced shear stability, maintaining the necessary viscosity for reliable engine function. This diesel engine oil comes in a 1-gallon container.