The Shell 550043040 Torq-Gard 15W-40 is a high-performance heavy-duty diesel engine oil, supplied in a 20-liter container. This product is engineered to provide robust protection and performance for a wide range of diesel engines, meeting API CI-4, CH-4, CG-4, CF-4, CF and ACEA E7, E5, E3 specifications. It delivers excellent wear protection, effective deposit control, and strong resistance to oxidation, ensuring engine longevity and reliability. This specific Torq-Gard formulation has been superseded by Shell Rimula R4 X 15W-40, which offers enhanced protection and extended drain capabilities for modern diesel engines.