When was the Last Time Your Fuels and Oils Were Tested for Signs of Contamination?
With 78% of the fuel samples we test contaminated, a quick test really can prevent a costly and disruptive disaster later. Can your business afford operational downtime? The unfortunate truth is that by choosing to allow your business to rely on contaminated fuel, you risk unexpected disruptions to your operations and high reactive maintenance costs.
As the fuel market becomes increasingly diverse, the need for routine and detailed analysis of oil continues to grow. Regular fuel testing, as part of a planned preventative maintenance programme, is an essential risk management tool for every business in every industry.

To learn more and discuss your requirements, call our fuel and oil testing experts today on 0330 123 3399
How does stored fuel become contaminated?
An increase in FAME content in fuels, coupled with the ever-reducing presence of sulphur, means the risk of fuel contamination is now higher than ever. This is due to the Renewable Transport Fuel Obligation (RFTO), which requires that 5% of fuel be derived from a sustainable source.
Hydrocarbon-based fuels, like red diesel, white diesel and heating oil are at a high risk of degradation through absorbing water from moisture in the atmosphere. This is a huge problem for stored fuel as it causes free water to collect on the bottom of your tank and remain suspended within the fuel. Water reacts with naturally occurring bacteria and causes sludge matter to accumulate and clog filters. All of this dramatically reduces fuel’s shelf life and necessitates the need for regular fuel testing.
Microbial-contaminated fuel symptoms
- Cloudy appearance – There’s water in your fuel
- Dark colour – Asphaltene particles are growing, which agglomerated, can block filters
- Varnish smell – The fuel is old
- Clogged filters – Sludge build-up
- Rusted tank – There is water in your tank

Tests conducted at our on-site fuel testing laboratory
To fully assess the health of your fuel, our chemists take true representative samples using bespoke fuel testing equipment as specified in ASTM Standard D4057-06. We can carry out an individual fuel sampling service or arrange a scheduled testing regime for your stored fuels and oils.
Fuels and oils that our expert team are able to test for our customers include:
- Diesel (DERV)
- Red diesel
- Heating oil
- and many more
Using the latest in fuel analysis technology, we look at your fuel’s composition, including:
- Density
- Viscosity
- ISO cleanliness (particulate examination)
- Microbial contamination level
- Sulphur content
- FAME content
- Water content
- Petrol contamination
Easy to read, diesel fuel analysis report
With every fuel sample tested, you’ll receive a detailed, in-depth report, using a traffic light system to clearly explain the condition of your fuel. So, regardless of your fuel knowledge, you’ll always be well-informed and supported with relevant guidance as required.
For more information on what’s involved in our fuel testing procedures, take a look at our fuel testing and analysis FAQs.
Lubricating and hydraulic oil analysis
We also offer oil testing and analysis for a wide range of oils and lubricants. This typically involves testing for:
- Metal in oil
- Fibre estimation
- PCB testing
- Buchholz gas analysis
- Furfuraldehyde analysis
- Transformer fuel analysis
Want to reduce contamination issues?
You can do just that by switching to the FAME-free fuel alternative, HVO fuel (Hydrotreated Vegetable Oil). This fossil-free, renewable diesel fuel is produced through hydrotreatment of renewable waste materials. This removes all impurities from the fuel, leaving a high-quality, sustainable fuel with a reduced risk of contamination.
Switching to HVO fuel offers many benefits over standard diesel fuel, including:
- Up to 10-year storage lifespan
- Drop-in functionality, removing the need for expensive infrastructure modifications
- Cuts net CO2 greenhouse gas emissions by circa 90%
- Year-round performance in all seasons, including low temperatures
- Reduces notifiable emissions, such as NOx and PM
- Endorsed by a wide range of OEMs
- Meets EN 15940:2016 and ASTM D975 specifications
- Fossil-free and FAME-free
- Certified by the ICSS
Related articles about fuel contamination
Ready to learn more about our fuel and oil testing services? Call our expert team today on 0330 123 3399 to find out how we can help you diagnose issues with your fuels and oils
Fuel Specialists Trusted for Over 75 Years
We guarantee all of our products and services. Our expert teams are the most experienced in the industry, and each individual is an expert in every aspect of their role.
We are passionate about providing excellent service at all times and our commitment to customer care makes us the perfect choice for your environmental service requirements.





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For help and advice relating to fuel oil testing and treatment
give our expert team a call today on 0330 123 3399
