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. With a tailored, low-ash (low SAPS*) formulation, it can help deliver:Excellent wear and engine protectionExtended drain capabilityOutstanding high-temperature performanceEngine cleanlinessDeveloped in close collaboration with major OEMs, Mobilgard HSD+ 15W-40 engine oil 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.Mobilgard HSD+ 15W-40 engine oil is formulated with optimise