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, Mobilgard™ 412 and Mobilgard™ 512 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
Related product
Mobilgard™ 410 NC marine engine oil
Next-generation Mobilgard™ 410 NC engine oil is formulated specifically for medium-speed GE and EMD engines.
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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
Typical Properties
| 312 | 412 | |
|---|---|---|
| SAE Grade | 30 | 40 |
| Sulphated Ash, wt%, ASTM D 874 | 2.1 | 2.1 |
| 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 |
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