Blended biodiesel is one of the most practical ways for UK organisations to reduce carbon emissions without changing vehicles or infrastructure. By blending renewable diesel with conventional diesel, businesses can lower lifecycle emissions, maintain operational performance, and transition towards net zero at a manageable pace.
Argent Fuels supplies blended biodiesel solutions nationwide, supporting fleets, commercial operators and public sector organisations with reliable fuel blends designed for real-world UK conditions.
What is blended biodiesel?
What is blended biodiesel?
Blended biodiesel is a diesel fuel that contains a percentage of biodiesel (FAME) mixed with standard mineral diesel.
Instead of using pure biodiesel (B100), blending allows renewable fuel to be introduced gradually while maintaining compatibility, performance and supply security.
Currently, the standard pump (retail) diesel on the road is a B7 blend, which contains up to 7% biodiesel, with the remainder being fossil fuel diesel. Blends that exceed 10% biodiesel content are categorised as blended biodiesel or high blend biodiesel.
Typical biodiesel blends include:
- B10: 10% biodiesel
- B20: 20% biodiesel
- B30: 30% biodiesel
In the UK, blended biodiesel is widely used across road transport, commercial fleets, construction, agriculture and industrial sectors as a drop-in, lower-carbon alternative to standard diesel.
Why is biodiesel blended with diesel?
Biodiesel is blended with mineral diesel to balance environmental benefit with operational reliability.
Key reasons blending is used include:
- Engine compatibility: Blended biodiesel works with the vast majority of modern diesel engines, particularly at low and mid-blend levels.
- Performance stability: Blending helps maintain consistent combustion, fuel flow and storage stability.
- Cold weather operation: Mineral diesel improves cold flow performance, making blended fuels suitable for UK winters.
- Gradual decarbonisation: Fleets can reduce emissions progressively without disruptive changes to vehicles or fuel systems.
This makes blended biodiesel a practical stepping stone for organisations at different stages of their sustainability journeys.
Biodiesel blends explained
Common biodiesel blends explained
Rather than thinking in technical specifications, it’s helpful to understand biodiesel blends by use case.
Low blends (e.g. B10)
Designed for maximum compatibility and ease of adoption. Often used where operational simplicity is the priority, with minimal change from conventional diesel.
Medium blends (e.g. B20)
A balance between emissions reduction and operational flexibility. It is ideal for fleets starting to increase biodiesel use and common in local authority fleets, logistics and mixed vehicle operations.
High blends (e.g. B30)
Offer the greatest carbon reduction while remaining usable in many modern commercial engines. High blends are increasingly adopted by organisations with formal sustainability targets.
Argent’s high-blend solution, Dieselite, is designed specifically for fleets seeking meaningful emissions reduction without moving away from liquid fuels.
High-blend biodiesel for greater carbon reduction
High blend biodiesel contains a larger proportion of renewable fuel, delivering significant lifecycle CO₂ savings compared to standard diesel.
Why organisations choose high blends
- Strong Scope 1 emissions reduction
- Supports ESG and sustainability reporting
- Compatible with many Euro V and Euro VI engines
- No charging or alternative fuel infrastructure required
High blends are particularly suited to:
- Commercial fleets
- Waste and recycling operators
- Logistics and distribution
- Construction and infrastructure projects
Argent’s Dieselite fuel is supplied nationwide and backed by robust quality control and technical support.
Environmental benefits
Environmental benefits of blended biodiesel
Blended biodiesel reduces emissions by replacing a portion of fossil diesel with renewable, waste-derived fuel.
Key environmental benefits include:
- Lower lifecycle greenhouse gas emissions
- Reduced reliance on fossil fuels
- Immediate impact without asset replacement
For many organisations, blended biodiesel provides one of the fastest and most cost-effective routes to reducing operational carbon today.
Engine Compatibility
Engine compatibility & UK regulations
Blended biodiesel is designed to work within existing UK fuel and engine standards.
- Most modern diesel engines can operate on low to medium biodiesel blends
- Higher blends may require OEM approval, depending on engine type
- Argent’s biodiesel components are produced to EN14214 standards
- Supply aligns with RTFO (Renewable Transport Fuel Obligation) requirements
For detailed fuel properties and compliance information, see our Specifications page.
Bulk & fleet supply of blended biodiesel
Argent Fuels is a leading UK supplier of blended biodiesel for commercial and fleet use.
We offer:
- Nationwide bulk delivery
- Flexible supply volumes
- Support for fleet operators and procurement teams
- Reliable, consistent fuel quality
- Secure and sustainable feedstock supply
- Secure ULSD supply
- Long-term supply partnerships
Whether you’re trialling biodiesel blends or rolling out a national fleet strategy, our team can help you identify the right solution. Speak to our team about blended biodiesel supply.
Dieselite
Explore Dieselite
Discover Dieselite, a low-carbon fuel for the HGV, bus and coach sectors delivering immediate greenhouse gas reductions using our high-blend biodiesel technology.
Dieselite Specifications
View the technical data for European fuel standards and our Dieselite blends here.
Calculate your CO₂ reduction savings
Use our calculator to work out how much you could reduce your carbon footprint
Frequently Asked Questions
Frequently Asked Questions
What is blended biodiesel?
Blended biodiesel is diesel fuel that contains a percentage of biodiesel mixed with mineral diesel to reduce emissions while maintaining performance.
Why is biodiesel blended with diesel?
Blending ensures compatibility, stability and cold-weather performance while allowing organisations to decarbonise gradually.
Can blended biodiesel be used in standard diesel engines?
Yes, most modern diesel engines can use low and mid blends. Higher blends depend on manufacturer guidance.
How does blended biodiesel compare to pure biodiesel?
Blended biodiesel offers easier adoption and broader compatibility, while pure biodiesel delivers higher carbon reduction but with changes required to vehicles.
What certifications should blended biodiesel meet in the UK?
Biodiesel components must always meet EN14214, and supply should align with RTFO sustainability requirements.
Can blended biodiesel be delivered in bulk to businesses?
Yes. Argent Fuels supplies blended biodiesel in bulk across the UK to fleets and commercial customers.
Get in Touch
Drop the Argent Fuels team a message if you have any questions or queries about the options available. Or, why not schedule a free fuels consultation?