Product Description Shell Rotella T6 5W-40 Diesel Engine Oil is a full synthetic motor oil that features exclusive Triple Protection Plus technology, formulated with fully synthetic base oils plus advanced additives to protect against wear, deposits and oil breakdown PLUS better low temperature flow and increased fuel economy performance, without compromising durability, compared to conventional SAE 15W-40 oils. Shell Rotella T6 5W-40 engine oil provides: Better Fuel EconomyThis full synthetic heavy-duty engine oil offers enhanced fuel economy capability of 1.5% that can save money in fuel consumption, without compromising engine protection or durability. Improved Wear PerformanceFull synthetic CK-4 heavy duty engine oil provides a significantly increased level of protection against harmful engine wear when compared to previous generation API CJ-4 engine oils. Improved Deposit Control The advanced multi-functional dispersant additives in combination with synthetic base oils provide an enhanced level of protection against the effects of soot, dirt and other contaminants. Improved Heat ResistanceFull synthetic heavy-duty engine oil resists breakdown by heat to provide continuous protection throughout the service interval. Emissions System CompatibilityAdvanced low-ash formulation helps control blocking of or poisoning of exhaust after-treatment devices, helping maintain vehicle emission compliance and engine fuel efficiency. Outstanding Shear StabilityShell Rotella T6 synthetic oil resists viscosity loss through shear and will maintain optimal pressure in the engine. Specifications, Approvals and RecommendationsAPI: CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4ACEA E9Allison TES 439Caterpillar ECF-2/ECF-3Cummins CES 20086; 20081Detroit Fluid Specification (DFS) 93K222, 93K218Ford WSS-M2C171-F1JASO DH-2JASO MA/MA2MAN M3575MB-Approval 228.31Volvo VDS-4.5, 4