High Performance Diesel Engine Oil

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.

Features and Benefits

Mobilgard™ HSD+ 15W-40 is formulated with optimized base oil technology, containing severely hydro-processed base stocks and a tailored additive system to deliver extended performance for up to 50% beyond OEM-recommended oil drain intervals (ODIs)1. This proprietary formulation delivers excellent wear protection, outstanding oxidation stability, and outstanding TBN retention.Mobilgard™ HSD+ 15W-40 also provides outstanding resistance to oil consumption, oxidation, corrosive and abrasive wear, and high temperature deposits.

The key benefits include:


Advantages and Potential Benefits

Meets demanding specifications of key OEMs

One engine oil for mixed fleet operations

Outstanding oxidation stability

Extended ODI capability. Reduced low temperature sludge build-up and high temperature deposits

Excellent soot and viscosity control

Greater engine efficiency, long engine life and long oil life

Excellent oil consumption control

Lower oil costs due to less make-up oil during operation

Outstanding TBN reserves

Corrosion protection and extended drain intervals for both new and old engines using up to 500 ppm sulphur diesel fuel

Resistance to corrosive and abrasive wear

Long life of critical wear surfaces

Component compatibility

Long gasket and seal life

Low ash formulation meeting API CK-4 and CJ-4 requirements

Long emissions aftertreatment life (DPF, DOC and SCR)

1Results may vary based on vessel/engine condition, load and environmental conditions. Consult OEM or ExxonMobil before implementing extended ODIs.


  • Recommended for the latest heavy duty diesel engines, including those equipped with aftertreatment systems and EGR.
  • Provides outstanding performance in the most severe service marine applications of modern high-speed diesel engines
  • Recommended for diesel applications using older and naturally aspirated conventional designs.
  • Diesel-powered equipment from American, European and Japanese OEMs.

Specifications and Approvals

Mobilgard HSD+ meets or exceeds the requirements of:


API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4 / SN




Caterpillar ECF-3


Cummins CES 20086, 20081




Mobilgard HSD+ is approved by the following OEMs:


Detroit Fluids Specification 93K222, 93K218


MB-Approval 228.31


MAN M 3275-1


Volvo VDS-4.5, VDS-4


Typical Properties

Mobilgard HSD+

SAE Grade


Viscosity, ASTM D 445

cSt @ 40ºC


cSt @ 100ºC


Viscosity Index, ASTM D 2270


Density @ 15ºC kg/L, ASTM D4052


Pour Point, ºC, ASTM D 97


Flash Point, ºC, ASTM D 92


Sulphated Ash, wt%, ASTM D 874


Total Base Number, mg KOH/g, ASTM D 2896


Health and Safety

Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet (MSDS) are followed. MSDS’s are available upon request through your sales contract office, or via the Internet. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.


It cannot be guaranteed that the product information given above is up to date. For the latest version of the Product Data Sheet we refer to the product library of ExxonMobil.