Lubricants are used extensively in marine settings. From the rigging on ships and thruster bearings to cranes used to haul cargo on and off shore. It puts them in direct contact with water and whether by planned operational discharge or accidental spills inevitably these lubricants used to keep equipment in good working order can end up in the sea.
Under the Vessel General Permit (VGP) requirements introduced by the US Environmental Protection Agency (EPA), vessels operating in US waters must use Environmentally Acceptable Lubricants (EALs) in all oil-to-sea interfaces unless technically infeasible. Even if you don’t operate directly under US jurisdiction, VGP-compliant lubricants have become an industry benchmark. Increasingly, ports, contractors and charter agreements expect them as standard.
The question is not whether to comply, it’s how to choose the right products for your operation.
What Are VGP-Compliant Lubricants?
VGP-compliant lubricants must meet strict environmental criteria. Specifically, they must be:
● Biodegradable
● Minimally toxic
● Non-bioaccumulative
These products are often referred to as Environmentally Acceptable Lubricants (EALs).
They are required in applications where there is a reasonable risk of lubricant discharge into the marine environment, including:
● Stern tubes
● Thrusters
● Rudder bearings
● Controllable pitch propellers
● Deck equipment
Using compliant products for fleet maintenance and port equipment management reduces both your environmental and regulatory risks.
Why Compliance Matters
Oil leaks in marine environments carry significant consequences causing huge harm to animal life and habitats which can persist for months or years. Even small discharges can:
● Trigger regulatory investigation
● Result in fines
● Damage reputation
● Delay operations
Traditional mineral-based lubricants can stay in water and sediment for extended periods. VGP-compliant lubricants are designed to break down more rapidly and reduce environmental impact.
For you, that means reduced liability, easier environmental reporting, alignment with ESG commitments and creates a stronger position during any tender process. Any responsible operator in the marine sector will be using EALs to mitigate any potential environmental risk.
Not All EALs Are Equal
Choosing VGP-compliant lubricants isn’t just a box-ticking exercise. Different formulations offer different performance characteristics which offer advantages and limitations depending on the application.
Common EAL base stocks include synthetic esters, polyalkylene glycols (PAGs) and vegetable-based oils. Synthetic esters, for example, often provide strong lubrication performance and temperature stability. PAGs offer excellent water tolerance but may have material compatibility considerations. And vegetable oils are biodegradable but can suffer from oxidative instability
If you’re operating in high-load, high-temperature or saltwater-intensive environments, product selection must balance compliance with durability.
Performance Under Pressure
One of the most common concerns around VGP-compliant lubricants is whether they match the performance of traditional mineral oils. Modern EALs are engineered to deliver:
● High film strength
● Corrosion protection
● Oxidation resistance
● Load-bearing capability
In stern tube and thruster applications, proper lubricant selection can extend component life and reduce maintenance intervals. For deck equipment and crane wire rope lubrication in marine environments, wash-off resistance is particularly important. A compliant lubricant that fails under salt spray exposure simply increases your replacement cycle.
When selecting products, you should evaluate:
● Load rating
● Water wash-off resistance
● Oxidation stability
● Seal compatibility
● Temperature range
Compliance is an essential part of the maintenance mix but it’s not the only thing you should consider – performance matters too.
Seal Compatibility And System Considerations
When you switch to VGP-compliant lubricants you may need to review seal materials and system compatibility. Some EAL formulations interact differently with elastomers compared to mineral oils. Therefore, before conversion, you should confirm seal compatibility, flushing requirements, cross-contamination risks and manufacturer approvals. Working with a specialist supplier helps ensure a smooth transition without unintended maintenance issues.
Supporting ESG And Sustainability Goals
Marine operators face increasing scrutiny around environmental responsibility but using VGP-compliant lubricants supports ESG reporting, sustainability targets, stakeholder confidence and charter compliance.
In many cases, operators who adopt environmentally acceptable lubricants across their fleets position themselves ahead of regulatory tightening. Rather than reacting to compliance changes, you’re proactively reducing environmental risk.
Making The Right Choice For Your Operation
Choosing VGP-compliant lubricants for marine and port operations requires finding the right balance between environmental compliance, operational reliability, long-term asset protection and maintenance efficiency.
By reviewing your oil-to-sea interfaces, assessing operational loads and selecting high-performance EAL formulations, you protect both your equipment and the marine environment. In an industry where environmental expectations continue to rise, the right lubrication strategy safeguards more than just machinery.
Ensure your marine operations meet VGP standards without compromising performance. Contact A&S International to discuss high-performance VGP-compliant lubricants tailored to your fleet and port equipment.
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