Fuel Polishing
Whether you manage backup generators, bulk fuel storage, MOD facilities or any other storage, BMS’s proactive maintenance approach ensures your fuel remains in prime condition year-round.
BMS engineers are available to perform fuel cleaning services anywhere in the UK and restore your diesel to an industry-best filtration level of micron 1 absolute, bringing it up to optimal ISO 4406 cleanliness standards. Bringing your fuel to high-quality standards helps save you money and waste and reduces the risk of operational breakdowns.
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Benefits of BMS Fuel Polishing:
- Fuel Polishing service delivered on-site anywhere in the UK
- Carried out by OFTEC and CompEx-certified engineers
- BMS uses the latest equipment
- Fuel testing and certification are provided
- Environmentally responsible service, filtering and re-using your fuel rather than disposing of it.
- Removing water, sludge, and microbial growth that cause engine damage and blocked filters
- Restoring fuel to optimal condition, preventing costly replacements or waste disposal
- Extending fuel and equipment lifespan, improving overall system reliability and efficiency
- Reducing downtime and operational disruption
- Improving fuel system performance
What Is Fuel Polishing?
Fuel cleaning or fuel polishing is a filtration process using finer filters to remove water, microbes, harmful contaminants, and sludge. It ensures a filtration level of 1 micron absolute, confirming EN590 and ISO4406 levels, and removing water to 100ppm, which is an industry best. Our fuel polishing unit will pump out dirty fuel and put it through the filtering process. The fuel is tested before returning to the tank, ensuring it meets industry standards. Our experts perform fuel cleaning without disrupting the use of your fuel or machinery, which means zero downtime for your operations. Once the fuel cleaning process is complete, you will be issued the fuel service certification. Our experienced engineers can also provide a full guide on all the maintenance needs, from professional inspection to DSEAR assessment.
Because of its organic substance, fuel naturally degrades over time, oxidising and absorbing water soon after leaving the refinery. When stored over long periods, condensation, microbes, and solid particles accumulate in the tank, creating a perfect condition for contamination, also known as diesel bug. This forms sludge that clogs filters and fuel lines. Rust, grit, and other particles can also enter the system, accelerate engine wear and reduce fuel efficiency, reliability and overall performance. Find out more.
Why Fuel Polishing Matters
Fuel Polishing, also known as fuel cleaning or diesel filtration, is a vital preventative maintenance process that restores fuel to avoid costly equipment breakdowns or internal tank corrosion. It extends the life of generators, filters, pumps, and plants and avoids fuel disposal costs through on-site cleaning. Additionally, fuel cleaning ensures uninterrupted operations of critical systems, which is a key part of compliance requirements for safety and business continuity. Your fuel should also be meeting industry standards, including ISO4403 and EN590, to avoid fines and non-compliance penalties. Clean, high-quality fuel burns more efficiently, optimising fuel consumption and reducing harmful exhaust emissions, contributing to a company’s environmental performance and helping meet broader ESG goals.
How We Deliver Fuel Cleaning Services
At BMS Group, we follow a step-by-step fuel polishing process designed to restore your fuel to its prime condition without interrupting your daily operations. Our highly skilled CompEx-certified engineers arrive on site equipped with the latest fuel polishing unit. They perform the following process:
Sampling & Analysis — Fuel samples are taken to identify contamination levels, including water content, microbial growth, and sludge.
Filtration & Treatment — Using an advanced portable fuel polishing unit, we remove water, sludge, and debris while treating the fuel to eliminate microbial contamination and restore it to its prime condition.
Fuel Testing & Certification — After polishing, we conduct fuel testing to confirm that your fuel meets the required standards. You will be issued a detailed report and fuel service certificate at the end of the process.
Maintenance Plan – Our OFTEC and CompEx-certified engineers can provide a complete guide on your fuel maintenance needs.
Our service suits all sectors that rely on stored fuel, including MOD, aviation, home delivery, hospitals, industrial facilities, emergency services, marine operations, or fuel storage sites.
With UK-wide coverage and flexible scheduling, BMS Group ensures minimal disruption to your operations — keeping your critical systems protected, compliant, and ready for when you need them most.
Why Choose Us
At BMS Group, we understand that every business is unique. That’s why we work closely with our clients to deliver reliable, environmentally responsible results that are tailor-made and bespoke plans to ensure the processes of the client are met and services delivered to a highest standard. With over 30 years of industry experience, we’ve built a reputation for quality, safety, and precision in fuel management and maintenance.
Our OFTEC and CompEx-accredited engineers provide tailored fuel polishing solutions designed to minimise disruption to your business efficiency. Combining technical expertise with hands-on experience, our team ensures your fuel systems are monitored and restored to optimum condition while offering expert advice on future maintenance.
Choose BMS Group for a trusted, professional service that protects your assets, supports compliance, and keeps your operations running smoothly.
Get a Quote or Book a Site Survey
Keep your stored fuel clean, compliant, and ready when you need it most. Contact BMS Group today for a quote or site survey and discover how our fuel polishing UK specialists can help protect your business from costly downtime. We provide expert stored fuel cleaning and maintenance solutions anywhere in the UK.
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