Engine designer MAN Energy Solutions responded to the emerging challenges of VLSFO (Very Low Sulphur Fuel Oil) in modern, efficient engines in May 2020, publishing a Service Letter, SL2020-694/JUSV, which sets out a new cylinder oil strategy “where the aim is to raise the performance level of cylinder oils by dividing them into two performance categories” - Category I and Category II.
Category II cylinder oils - designed for all MAN B&W engines and recommended for Mark 9 and higher. In 2020, performance levels were introduced to distinguish between different types of cylinder oils. Cat. II is the overall higher performing category of the two categories (Cat. I and Cat. II).
Cat. II cylinder oils have excellent overall performance with a particular emphasis on the exceptional cleaning ability. To achieve this status, a cylinder oil must complete extensive testing. The lubricants awarded Cat. II status are 40 BN, 100 BN and 140 BN cylinder oils.
New cylinder oil elin CDO 40 MC II with NOL issued by MAN is the latest addition to elin Marine Lubricants range of cylinder oils meeting the highest performance standards. It is designed to provide improved marine engine protection over previous generation of low Base Number (BN) formulations. Particularly intended for lubricating the cylinders of the slow-speed crosshead (2 stroke) engines running on VLSFO (DM/RM) Sulphur content 0,50 % max or partially in ECA areas using ULSFO (DM/RM) with sulphur content 0,10 % max, blended from highly refined base oils and carefully selected new generation additives to provide superior ring and liner wear protection and excellent piston cleanliness in crosshead engines.
Offers enhanced piston and piston ring pack cleanliness and liner wear protection as a result of high dispersant and detergent effectiveness, at moderate BN level
Prolongs components life
Further extends thermal stability
Time saving
Storage tanks Saving
Protects the latest engine designs, operating on fuels with sulphur content of 0,5% and lower, from wear and corrosion
• Improves scavenge space and exhaust track cleanliness by having significantly lower sulfated ash content than existing MAN ES Category II 100 and 140 BN lubricants
• Avoids alternating between high and low BN cylinder oils to improve piston cleanliness, simplifying operations
• Storage stability
elin CDO 40 MC II is recommended for cylinder lubrication of the latest generation large low-speed marine diesel engines equipped with exhaust abatement technologies, operating with a range of low and up to zero sulphur fuels including VLSFO, ULSFO, LNG and methanol. elin CDO 40 MC II should be used in accordance with OEM guidelines and recommendations.
elin CDO 40 MC II is fully compatible with all cylinder oils.
| Specification | Test | Test results* |
|---|---|---|
| SAE | - | 50 |
| Specific gravity @ 15 °C | ASTM D 4052 | 0,9189 |
| Kin. Viscosity at 100°C, cSt | ASTM D 445 | 18,87 |
| Kin. Viscosity at 40°C, cSt | ASTM D 445 | 192,37 |
| Viscosity Index | ASTM D 2270 | 110 |
| Flash point (C.O.C.), °C | ASTM D 92 | 240 |
| Pour Point, °C | ASTM D 97 | -12 |
| Base Number, mg KOH/g ( TBN ) | ASTM D 2896 | 40 |
| Calcium % wt | ASTM D 5185 | 1,43 |
| Zinc % wt | ASTM D 5185 | 0,05 |
| Phosphorous % wt | ASTM D 5185 | 0,05 |
| Magnesium % wt | ASTM D 5185 | 0,006 |