Mobilgard™ HSD+ 15W-40 is an advanced (API CK-4), multigrade oil formulated for use in severe-service, high-speed diesel engines in marine applications. The lubricant, which can help extend engine life, meets or exceeds many original equipment manufacturer (OEM) requirements and delivers high performance in a range of engine types.

Fully backward compatible, Mobilgard HSD+ 15W-40 engine oil delivers exceptional performance in both newer and older heavy-duty engine designs.