Mobilgard™ M40 Series diesel engine oils
Mobilgard™ M40 Series extra-high-performance, premium 40 TBN engine oils (Mobilgard™ M340 and Mobilgard™ M440) are designed for use in the most severe, residual-fuelled, medium-speed diesel applications found in marine and stationary power industries.
Formulated using the latest additive detergent technology, Mobilgard M40 Series oils provide the following benefits:
- Reduced deposits in piston undercrown and ring belt areas
- Extends the life of critical wear surfaces
- Clean camshaft and crankcase spaces
- Protects wear surfaces from water and acidic corrosion
- Reduced sludge formation, longer oil life, cleaner engines
- Reduced lubricant consumption
- Combats fuel and combustion related corrosion and deposits
Mobilgard™ M50 diesel engine oil
Mobilgard™ M50 extra-high-performance 50 TBN marine engine oil is designed for use in the most severe residual-fuelled, medium-speed diesel applications.Learn more
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Mobilgard™ M430 is compatible with dual-fuel engines running on heavy fuel oil | ExxonMobil marine
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Features and Benefits
Mobilgard M440 oil has outstanding thermal and oxidation stability. It has excellent TBN retention and resistance to viscosity increases over long operating periods. It also promotes a high level of engine cleanliness with protection against wear. Compared to other medium speed engine oils, it has excellent lube/fuel compatibility and separates easily from water.
When used as recommended, Mobilgard M440 oil provides the following benefits:
|Features||Advantages and Potential Benefits|
|Excellent thermal and oxidation stability||Reduced deposits in piston undercrown and ring belt areas|
|Improved anti-wear properties||Extends the life of critical wear surfaces|
|Advanced detergency/dispersancy||Clean camshaft and crankcase spaces|
|Outstanding rust and corrosion properties||Protects wear surfaces from water and acidic corrosion|
|High Residual Fuel Compatibility||Reduced sludge formation, longer oil life, cleaner engines|
|Low volatility base stocks||Reduced lubricant consumption|
|Excellent TBN Reserve and Retention||Combats fuel/combustion related corrosion and deposits|
Mobilgard M440 oil can be used in most medium-speed trunk piston engine applications. It is recommended for use in main propulsion and auxiliary engines on deep-sea vessels; in main propulsion engines on coastal and river ships; and in stationary power plants. This oil is the result of an extensive research and development program, incorporating ExxonMobil's patented DAC (Detecting Asphaltene Contamination) Test.
Mobilgard M440 oil is designed to meet the needs of engines operating on heavy fuel. It is recommended for use in the latest model medium speed diesel engines and are especially beneficial in engines having low crankcase oil consumption or operating with low cylinder liner temperatures. Relatively high alkalinity reserves in this oil provides superior protection in neutralising the strong acids resulting from the use of high sulphur fuels that find access to the crankcase to promote oil degradation and ring, cylinder, and bearing corrosion.
|Specific Gravity at 15ºC||0.915|
|Flash Point, ºC, ASTM D 92||242|
|Pour Point, ºC, ASTM D 97||-6|
|Viscosity, ASTM D 445||
|cSt, at 100ºC||14.0|
|TBN, mg KOH/g, ASTM D 2896||40|
|Sulphated Ash, wt%, ASTM D 874||5.0|
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