This Chevron Delo® 400 SDE 15W-40 CK4 Heavy Duty Diesel Engine Oil keeps you Ready for the Road Ahead™, as a superior heavy duty motor oil, formulated for 2017 greenhouse gas (GHG 17) compliant diesel engines. With ISOSYN Advanced Technology™, gain lower emissions, longer engine life, and improved fuel economy for your semi truck. In addition, ISOCLEAN® certification equates to minimized downtime, reduced maintenance costs, and extended equipment life. This heavy duty motor oil also boasts premium bearing corrosion protection, which is critical for Exhaust Gas Recirculation (EGR) engines. FleetPride is your First Click in Heavy Duty®.