Energy Spring NS CYL 540 Cat II
Marine Cylinder Oil
SAE 50 BN 40
NS CYL 540 Cat II is a BN 40, SAE 50 cylinder oil developed to the Everllence (MAN ES) Category II performance level for the latest generation of low-speed two-stroke crosshead engines. A high-detergency, reduced-ash additive system delivers piston and ring-pack cleanliness at the level of a high-BN lubricant, removing the need to alternate between high and low BN oils for clean-up purposes. Highly refined base oils sustain the lubricant film at the elevated peak firing pressures and liner temperatures of modern engine designs.
Recommended for the cylinder lubrication of low-speed crosshead two-stroke marine diesel engines operating on fuels with a sulphur content from 0 to 0.50% (VLSFO, ULSFO and distillates), and on dual-fuel and LNG operation in accordance with OEM guidance. Applicable to all Everllence (MAN ES) MAN B&W two-stroke engines and intended for Mark 9 and later designs. NS CYL 540 Cat II currently holds an Everllence (MAN ES) Letter of Support; Category II No Objection Letter status is subject to completion of the service and confirmation field tests.
Everllence (MAN ES) LOS – Cat. II
MHI-MME
WinGD
Deposit Control
High-detergency chemistry keeps piston crowns, ring lands and ring grooves clean at the level of a high-BN lubricant, removing the need to alternate between high and low BN oils for clean-up purposes.
Reduced Ash
A lower sulphated ash level than conventional high-BN lubricants limits hard deposit build-up in the scavenge space, cylinder ports and exhaust gas track, protecting downstream equipment.
Acid Neutralization
A 40 BN alkaline reserve matched to low sulphur fuels neutralises combustion acids without over-basing, protecting liners and rings from cold corrosion across the 0–0.50% sulphur range.
Film Strength
Maintains a continuous, load-bearing film at the elevated peak firing pressures and liner temperatures of the latest engine designs, controlling wear and scuffing risk at optimised feed rates.
Characteristics
| PROPERTY | TEST METHOD | VALUE |
|---|---|---|
| Density at 15°C | ASTM D4052 | 0.915 g/cm³ |
| Kinematic Viscosity @ 40°C | ASTM D445 | 216 cSt |
| Kinematic Viscosity @ 100°C | ASTM D445 | 19.3 cSt |
| Viscosity Index | ASTM D2270 | 101 |
| Pour Point | ASTM D97 | -20 °C |
| BN | ASTM D2896 | 40 mgKOH/g |
| Flash Point (COC) | ASTM D92 | 240 °C |