• Large text
  • Medium text
  • Small text
  • text size

Mobilgard M30 Series 

Mobilgard™ M30 Series

Trunk piston engine oils
Extra high performance 30, 40 and 50 TBN trunk piston engine oils recommended for use on deep-sea vessels, coastal and river ships.

Formulated using the latest additive detergent technology, the Mobilgard™ M Series provides:

  • Excellent high temperature oxidation
  • Good thermal stability
  • Low volatility
  • High load carrying properties
  • Outstanding corrosion protection

Maintaining engine cleanliness
Mobilgard M Series’ excellent TBN retention and resistance to viscosity increase helps extend component life and cleaning intervals.

The oils’ excellent thermal and oxidation stability helps prevent deposit build-up. This reduces wear and risk of premature component failure.

Minimised engine wear and cost savings
The Mobilgard M Series’ outstanding rust and corrosion properties help protect from wear and acidic corrosion, thereby potentially keeping maintenance and repair costs to a minimum.

Excellent lube-fuel compatibility
Exemplary residual fuel compatibility characteristics helps reduce sludge formation, leading to longer oil life and excellent engine cleanliness.

OEM Approvals
Mobilgard M Series has received No Objection Letters from Wartsilla and Caterpillar.

Mobilgard M30 Series oils have high performance thermal and oxidation stability. They have excellent TBN retention and resistance to viscosity increases over long operating periods. They also promote a high level of engine cleanliness with protection against wear. Compared to other medium speed engine oils, they have excellent lube/fuel compatibility and separate easily from water.

When used as recommended, Mobilgard M30 Series oils provide the following benefits:

FeaturesAdvantages and Potential Benefits
Excellent thermal and oxidation stabilityReduced deposits in piston undercrown and ring belt areas
Improved anti-wear propertiesExtends the life of critical wear surfaces
Advanced detergency/dispersancyClean camshaft and crankcase spaces
Outstanding rust and corrosion propertiesProtects wear surfaces from water and acidic corrosion
High Residual Fuel CompatibilityReduced sludge formation, longer oil life, cleaner engines
Low volatility base stocksReduced lubricant consumption
Excellent TBN Reserve and RetentionCombats fuel/combustion related corrosion and deposits

Mobilgard M30 Series oils can be used in most medium-speed trunk piston engine applications. They are 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 new Series of oils is the result of an extensive research and development program, incorporating ExxonMobil's patented DAC (Detecting Aspahltene Contamination) Test.

Mobilgard M30 Series oils are designed to meet the needs of engines operating on heavy fuel. They are 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 these oils provide excellent 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.

 Mobilgard M30 SeriesM330M430
SAE Grade3040
Specific Gravity at 15ºC0.9070.907
Flash Point, ºC, ASTM D 92244250
Pour Point, ºC, ASTM D 97-6-6
Viscosity, ASTM D 445  
cSt, at 100ºC12.014.0
TBN, mg KOH/g, ASTM D 28963030
Sulphated Ash, wt%, ASTM D 8743.83.8