Your diesel might look clean when it goes into the tank, but that doesn’t mean it will stay that way.
Water, sediment, microbial growth and deposits can all contribute to diesel fuel contamination, potentially affecting filters, injectors and the reliability of your fuel system.
For boats and commercial vessels, where fuel may remain onboard for long periods or come from different suppliers and locations, keeping that fuel in good condition matters.
What Causes Diesel Fuel Contamination?
Contamination can enter or develop within the fuel system in several ways.
Water can be introduced with fuel or accumulate through condensation. Sediment and deposits can build up over time, while the presence of water can create conditions in which microbial contamination , commonly known as diesel bug, can become established.
Fuel quality and storage conditions can also vary considerably, particularly for vessels bunkering at different locations.
What Problems Can Contaminated Fuel Cause?
Problems aren’t always immediately obvious.
As contamination builds, it can contribute to:
- Blocked fuel filters
- Sludge and deposits
- Water accumulation
- Injector deposits
- Poor fuel system cleanliness
- Increased maintenance
- Fuel related operational problems
For a vessel relying on its engines, generators or other diesel-powered equipment, prevention is far preferable to discovering a problem when the fuel is already being used.

Managing Contamination Before It Becomes a Problem
V25 is designed for continuous preventative fuel management.
Its physical fuel-conditioning action helps separate water and disperse agglomerations and deposits, supporting their removal through normal drainage, filtration and separation processes.
V25 is not a biocide and doesn’t chemically kill microorganisms. Instead, it helps manage the fuel environment and the conditions associated with microbial contamination.
More Than Contamination Management
V25 doesn’t stop at the tank.
It also helps support fuel stability, lubricity, pumps and injection equipment, injector cleanliness, improved atomisation and more complete combustion.
It’s non-hazardous, vegetal-derived, ashless and metal-free, making it straightforward to incorporate into routine fuel management.
At the standard dosage, just 1 litre treats up to 10,000 litres of fuel.
Don’t Wait Until Your Filters Tell You There’s a Problem
Diesel fuel contamination is much easier to manage before it develops into blocked filters, sludge or operational disruption.
Regular fuel checks, water drainage, good tank maintenance and preventative fuel treatment can all form part of a sensible fuel-management programme.
V25 provides one treatment designed to support your fuel throughout the system, from tank to funnel.
Premier Fuel Solutions supplies V25 for leisure boats, superyachts, fishing vessels, workboats, passenger vessels and commercial marine applications.
