Marine Piston S4 40
Pure Tech Marine Piston S4 40 is a multifunctional crankcase lubricant for highly rated medium-speed diesel engines operating on residual fuel. Pure Tech Marine Piston S4 40 has a BN of 40 and is designed for conditions of high oil stress. In addition Pure Tech Marine Piston S4 40 has been optimised to improve deposit control.
PERFORMANCE, FEATURES & BENEFITS
Reliable engine performance:
- Extended oil life: Marine Piston S4 40 is a BN 40 oil which has been optimised to resist oxidation and maintain BN in order to reduce the amount of oil sweetening that is required.
- Engine protection: Marine Piston S4 40 has a high level of detergency leading to exceptionally clean crankcase, valve deck and pistons. The formulation has been further optimised to reduce deposits in critical areas, e.g. piston undercrown.
- System efficiency: Marine Piston S4 40 has a high detergency/low dispersancy formulation in order to effectively release contaminants and water in centrifugal separators.
Main Application:
Medium-speed industrial or marine propulsion and auxiliary engines, burning residual fuel oils, which create conditions of moderate oil stress. These conditions usually occur:
- In newer engine designs, less than 10 years old and/or fitted with flame rings
- Where oil consumption is 0.5 – 1 g/kWh
- Where load factors are >85%
- Where fuels with sulphur >2% are in use
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TYPICAL PHYSICAL CHARACTERISTICS
Technical data includes viscosity, density, flash point, and sulfur content. These characteristics ensure proper engine performance and compliance with environmental regulations, displayed comprehensively in the table below.
| PROPERTIES | METHOD | Marine Piston S4 40 | ||
|---|---|---|---|---|
| SAE grade (viscosity class) | 40 | |||
| Kinematic Viscosity | @40°C | mm²/s | ASTM D445 | 127 |
| Kinematic Viscosity | @100°C | mm²/s | ASTM D445 | 13.7 |
| Viscosity Index | ASTM D2270 | 104 | ||
| Density | @15°C | kg/m³ | ASTM D4052 | 916 |
| Flash Point (PMCC) | °C | ASTM D93 | 230 | |
| Pour Point | °C maximum | ASTM D97 | -9 |
|
| Base Number | mg /KOH/g | ASTM D2896 | 40 | |
| Sulphated Ash | % m/m | ASTM D874 | 5.0 | |
| Load Carrying Capacity (FZG Gear Machine) | Failure Load Stage | ISO 14635-1 A /8.3/90 | 11 |
Health and Safety
HEALTH, SAFETY & ENVIRONMENT
Pure Tech Marine Piston S4 40 is unlikely to present any significant health or safety hazard when properly used in the recommended application and good standards of personal hygiene are maintained.