Mobilgard™ HSD+ 15W-40 is an advanced, multi-grade diesel engine oil that help extend engine life and is formulated for severe service high-speed diesel engines in marine applications. Mobilgard™ HSD+ 15W-40 meets or exceeds many original equipment manufacturer (OEM) requirements and delivers high performance. Fully backward compatible, Mobilgard™ HSD+ 15W-40 delivers exceptional performance in both newer and older heavy duty engine designs. Accordingly, these oils meet or exceed the requirements of API CK-4, CJ-4, CI-4 PLUS, CI-4 and CH-4 service categories, as well as key OEM requirements.   Mobilgard™ HSD+   15W-40 uses a tailored formulation that delivers excellent wear and engine protection, extended drain capability, outstanding high temperature performance and engine cleanliness. Developed in close collaboration with major OEMs, Mobilgard™ HSD+ 15W-40 is recommended for use in a wide range of heavy duty applications and in the most severe marine environments. This product provides outstanding protection in the most demanding diesel engines of Caterpillar, Cummins, Detroit, Mercedes Benz, MAN, Volvo, and others.