Shell Rotella® T6 0W40 full synthetic heavy duty diesel engine oil features Shell exclusive “Low-Saps” additive technology reinforced with a novel and unique anti-wear system. Protective power is further enhanced through the use of synthetic base oil technology that increases additive activity to deliver low-viscosity fuel saving performance with no compromise in durability. Key benefits include compatibility with exhaust emissions control systems, protection in extreme operating temperatures and fuel economy performance. Shell Rotella® T6 0W40 synthetic oil is based on free flowing synthetic base oils that allow reliable pumping on start-up under extreme cold climate conditions yet remain thick enough under high temperature operation to protect against wear. Specifications, Approvals & Recommendations: API CJ-4, SN, Caterpillar ECF-3, ECF-2, Mack EO-N, Volvo VDS-3.