Types of Marine Lubricants by Application
Here is a general classification of marine
lubricant types and their functions:
|
Lubricant Type
|
Application
|
Key Characteristics
|
|
Cylinder Oil
|
Large 2-stroke ship engines (slow-speed
engine)
|
High TBN content to neutralize sulfur from
fuel
|
|
System Oil
|
Crankcase lubrication systems of 2-stroke
engines
|
High detergency, cleans sludge
|
|
Trunk Piston Engine Oil (TPEO)
|
Medium-speed 4-stroke engines (auxiliary
engine)
|
Strong dispersancy, oxidation control
|
|
Gear Oil
|
Gearbox, propeller shaft
|
High viscosity, EP additives
|
|
Hydraulic Oil Marine Grade
|
Ship steering systems, cranes
|
Stable against temperature and seawater
|
|
Stern Tube Oil
|
Propeller seal at the ship's stern
|
Anti-rust and biodegradable additives
|
|
Compressor Oil
|
Ship air compressors
|
Stable against heat and high pressure
|
Technical Characteristics of Ideal Marine
Lubricants
Marine lubricants must possess superior technical
properties to guarantee performance and sailing safety:
|
Technical Parameter
|
Description
|
|
Viscosity Index (VI)
|
Must be high to remain stable across various
temperatures
|
|
Total Base Number (TBN)
|
Neutralizes acids resulting from high-sulfur
fuel combustion
|
|
Thermal Stability
|
Prevents the formation of varnish and
deposits
|
|
Water Separability (Demulsibility)
|
Ability to separate from seawater
|
|
Anti-Wear & EP Additives
|
Protection against shock loads
|
|
Oxidation Stability
|
Longer service life, suitable for
long-distance voyages
|
|
Detergency & Dispersancy
|
Maintains cleanliness of engine rooms and
pistons
|
Standards & Certifications for Marine
Lubricants
Reliable marine lubricants must comply with or
obtain approval from:
- OEM Engine Approval: MAN
Energy Solutions, Wärtsilä, Mitsubishi, Hyundai Heavy Industries
- IMO 2020 Compatibility: Suitable
for low-sulfur fuels
- ISO 8217 Fuel Compliance: Tolerance
towards marine fuel quality
- EAL (Environmentally Acceptable Lubricants): Specifically for stern tubes and biodegradable lubricants
Examples of Marine Lubricant Use in the Industry
- International Cargo Ships (Container Ship): Use Cylinder Oil TBN 100 for 2-stroke main engines with HSFO.
- LNG Tankers: Use
Trunk Piston Engine Oil SAE 30 for medium-speed 4-stroke engines.
- Passenger Ferries: Use
Marine Gear Oil ISO VG 220 for propulsion transmission systems.
- Tugboats: Use Hydraulic Oil AW 68 with
anti-rust additives for winches and cranes.
- Fishing Vessels: Use
environmentally friendly stern tube lubricants (EAL) to prevent sea
pollution.
Advantages of Quality Marine Lubricants
✅ Optimal Marine Engine Protection
Designed specifically to handle extreme temperatures and high pressure during
long voyages.
✅ Fuel Efficiency & Engine Performance
Reduces internal friction, improves thermal efficiency.
✅ Extends Engine & Component Lifespan
Reduces wear and prevents the formation of carbon deposits and sludge.
✅ Environmentally Friendly (Eco-Friendly)
Biodegradable lubricant variants are highly suitable for vessels in
environmentally sensitive waters.
✅ Global Fuel Standard Compatibility
Suitable for VLSFO, LNG, LSFO fuels, and compliant with IMO 2020 regulations.
Usage and Maintenance Recommendations
- Select TBN according to ship fuel:
- HSFO (High Sulfur Fuel Oil): Use cylinder oil TBN 70–100
- VLSFO (Very Low Sulfur Fuel Oil): Use TBN 40–60
- LNG: Use neutral lubricants, low TBN
- Regular Oil Analysis (Used Oil Analysis):
Early detection of issues like fuel dilution, oxidation, water
contamination.
- Filtration & Water Separation Systems:
Use centrifugal separators & purifiers to maintain oil cleanliness.
- Lubricant Temperature & Pressure Monitoring:
Avoid overheating or underpressure that could lead to engine failure.
Marine Lubricants Product Packaging
Marine lubricants are generally available in:
- Pail 20–25 liters for quick topping-up
- Drum 200 liters for regular needs
- IBC Tank 1,000 liters for automatic lubrication circulation systems
- Bulk Delivery directly to ship tanks via port bunker oil supply
Conclusion
In an increasingly competitive shipping world
strictly regulated by environmental policies, the use of high-quality Marine
Lubricants is not just a technical necessity, but also a strategy for
efficiency and sustainability. The right lubricant will keep the engine in
prime condition, reduce fuel consumption, and protect ship asset investments in
the long term.
For commercial ship operators, fishing companies,
and offshore industry fleet owners, selecting the appropriate marine lubricant
is a smart step towards reliable and environmentally friendly operations.