29th October 2025
Marine fuel contamination is a critical issue affecting engine performance, efficiency, and longevity. Contaminants in fuel can lead to filter clogging, corrosion, injector damage, and even complete engine failure if not properly managed. Understanding the common causes of contamination and implementing effective prevention strategies are essential for reliable vessel operation.
Key Sources of Contamination…
Condensation – occurs when temperature fluctuations cause moisture to form inside fuel tanks. Over time, this leads to water accumulation at the bottom of tanks.- Water ingress – occur through faulty seals, vents, or during rough weather, allowing seawater to mix with the fuel.
- Bunkering quality – fuel supplied from shore tanks may already contain impurities, sludge, or incompatible additives.
- Sloshing – fuel sloshing during vessel movement can disturb settled sediments, redistributing contaminants throughout the system.
- Microbial growth – particularly bacteria and fungi at the fuel-water interface, can create organic sludge and acids that accelerate corrosion and block filters.
To prevent these problems, vessels must adopt robust fuel management practices. Regular sampling and testing during bunkering, maintaining dry and sealed storage tanks, and periodic tank cleaning are fundamental steps. A crucial part of any preventive plan is the use of a fuel polishing system. This system continuously recirculates and filters the fuel, removing water, particulates, and microbial matter before they reach the engine. By keeping fuel clean and dry, polishing systems extend component life, reduce maintenance costs, and ensure dependable engine operation.
Fuel polishing is a specialist process that uses advanced filtration and separation technology to clean your stored diesel without the need for disposal or replacement, restoring it to a clean, reliable state.
It’s not just maintenance — it’s RISK MANAGEMENT. By safeguarding your fuel supply, you safeguard your operations, protect your investment, and gain peace of mind.
FUEL POLISHING | W-PFS PREMIUM RANGE | WB CLASSIC RANGE | W-HL HIGH LIFT RANGE