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Mobilgard™ 300 C is a premium quality system oil specially formulated to provide superior engine cleanliness, better wear protection and longer oil life when compared with conventional system oils. It is designed for use in two-stroke, crosshead marine diesel engines operating under severe conditions. This product has sufficient alkalinity to protect against strong acids which may find their way into the crankcase from the combustion of fuel sulphur, and it has enhanced load carrying ability in order to reduce wear in heavily loaded bearings and gears.
The high quality paraffinic base oils used in Mobilgard 300 C have excellent thermal stability and oxidation resistance. The formulation includes proprietary detergent and anti-wear additive systems to deliver enhanced crankcase cleanliness, along with excellent protection for highly-loaded engine parts. Mobilgard 300 C also provides good rust protection in case of water contamination, and excellent water separation characteristics.
When used as recommended in crosshead type diesel engines, Mobilgard 300 C system oil offers the following features and potential benefits:
Features
Advantages and Potential Benefits
Enhanced detergency and improved thermal and oxidation stability
Reduced deposits in piston cooling spaces
Better piston cooling efficiency
Cleaner crankcases and circulation tanks
Enhanced load-carrying and anti-wear performance
Excellent protection for highly loaded engine components such as bearings and gears
Excellent rust and corrosion properties
Longer bearing life
Protects critical bearing surfaces
Good water tolerance and separation capability
Effective lubrication in the presence of water
Longer oil life due to efficient water separation
Mobilgard 300 C is recommended primarily for use as system oil in late model, high-output, crosshead diesel engines, especially those engines employing the system oil for piston cooling. It will prevent or reduce deposit formation in the piston cooling spaces, thus maintaining piston cooling efficiency and reducing the incidence of piston top burning and piston crown cracking. It will also prevent or reduce crankcase deposits and will provide outstanding protection for heavily loaded bearings and gears. Good rust prevention and water separation characteristics make Mobilgard 300 C an excellent system oil in older design crosshead diesel engines which have water-cooled pistons and where crankcase deposits can be a problem with lower-quality system oils.
Property
Grade
SAE 30
Ash, Sulfated, wt%, ASTM D874
1.06
Flash Point, Cleveland Open Cup, °C, ASTM D92
245
FZG Scuffing, Fail Load Stage, A/8.3/90, ISO 14635-1
12
Kinematic Viscosity @ 100 C, mm2/s, ASTM D445
11.9
Kinematic Viscosity @ 40 C, mm2/s, ASTM D445
109
Pour Point, °C, ASTM D97
-24
Specific Gravity, 15.6 C/15.6 C, ASTM D4052
0.8665
Total Base Number, mgKOH/g, ASTM D2896
9
Viscosity Index, ASTM D2270
98
Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @ http://www.msds.exxonmobil.com/psims/psims.aspx