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Mobilgard™ 12 Series diesel engine oil

Mobilgard™ 12 Series high-performance diesel oils are designed for use in marine trunk piston engines operating on low sulphur distillate fuels. The oils are compatible with ExxonMobil Premium ECA category fuels. They provide outstanding corrosion and wear protection, as well as helping engine cleanliness and water separation properties.

Mobilgard™ 312 and Mobilgard™ 412 are particularly effective in small bore, high-speed engines in fishing fleets; in new, severe service engines; and in many types of medium-speed engines.

Potential benefits of Mobilgard 12 Series oils include:

  • Extended periods between inspections, overhaul and cleaning
  • Reduced ring and liner wear
  • Increased protection against corrosive wear
  • Increased oil service life and cleaner engines
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Product Information
Technical resources
Guidelines for switchover to ExxonMobil marine lubricants
Learn about five different circumstances related to switching and mixing ExxonMobil marine lubricants.
Storage and handling: Best practices and guidelines for marine lubricants
Learn more about best practices for handling, storing and dispending ExxonMobil marine lubricants
Features and Benefits

Mobilgard 12 Series is formulated with base oils having proven successful performance in diesel engines. The additive system is balanced to provide excellent resistance to thermal degradation under moderately severe operating conditions. They also provide good engine cleanliness and superior wear protection.

When used as recommended, Mobilgard 12 Series oils provide the following features and potential benefits:

 

Features Advantages and Potential Benefits
Excellent thermal and oxidation stability Extended periods between inspections, overhaul and cleaning
Improved antiwear properties Reduced ring and liner wear
Excellent TBN reserve and retention Increased protection against corrosive wear
Excellent detergency/dispersancy properties Increased oil service life
Cleaner engines

 

Applications
The Mobilgard 12 Series diesel engine oils are intended for use as cylinder and bearing lubricants in marine and industrial diesel engines operating on distillate fuels or light fuel blends. They are particularly effective in high speed engines in fishing fleets; in new, severe service engines; and in many types of medium speed engines. They may be used as crankcase lubricants in large crosshead type diesel engines operating on high sulphur fuels.
Typical Properties
  312 412
SAE Grade 30 40
Specific Gravity at 15ºC 0.896 0.899
Flash Point, ºC, ASTM D 92 266 272
Pour Point, ºC, ASTM D 97 -9 -9
Viscosity, ASTM D 445    
cSt, at 40ºC 108 142
cSt, at 100ºC 12.0 14.5
Viscosity Index, ASTM D 2270 100 100
TBN, mg KOH/g, ASTM D 2896 15 15
Sulphated Ash, wt%, ASTM D 874 2.1 2.1

 

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Industry Sectors
  • deep sea shipping industry
Product Features
  • Conventional oil
  • Corrosion protection
  • Energy Efficient
  • Enhanced Wear Protection
  • Extended Life
  • Extreme Pressure
  • High Moisture
  • High Temperature
  • Low Temperature
  • Synthetic
  • Vessel General Permit VGP
  • Water Resistance
  • Wide Temperature
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