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Gas oil

Short explanation: Gasoil (10ppm), commonly known as red diesel, is a rebated middle distillate fuel used in off-road sectors such as agriculture, rail, and non-commercial heating. It is chemically similar to white diesel but includes a red dye and additives to distinguish permitted use. Its lower duty rate makes it a cost-effective option where regulations allow.

With MB Energy, Gasoil supply is structured around your operational needs. We support consistent availability, clear delivery planning and nationwide coverage to keep your operations running efficiently.

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Gasoil

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Gasoil

What is Gasoil?

Gasoil is a rebated diesel fuel classified as a middle distillate and widely used in off-road and non-commercial applications. It is commonly referred to as red diesel due to the red dye added for identification and regulatory control.

It is chemically similar to standard (white) diesel but includes specific additives and colouring agents. These ensure it can be distinguished during inspections and used only within permitted sectors.

The fuel benefits from a lower fuel duty rate, which directly impacts operating costs. However, its use is strictly regulated and limited to defined applications such as agriculture, rail and certain heating systems.

In practice, Gasoil is used to power machinery, equipment and heating systems where road fuel regulations do not apply, providing a cost-efficient and widely available solution.

Typical Applications

Gasoil is used across sectors where off-road fuel use is permitted under current UK regulations.

Agriculture & Forestry

Used in tractors, harvesters and forestry machinery. Supports day-to-day operations where off-road fuel use is permitted.

Rail Industry

Used for railway operations, particularly in non-electrified systems and maintenance equipment.

Non-Commercial Heating

Suitable for heating systems in non-commercial premises such as state schools and hospitals, subject to system compatibility.

Marine & Specialist Use

Applicable for certain marine uses and specialist sectors, depending on regional rules and declarations.

Technical Specifications

Gasoil is defined by recognised standards and measurable fuel characteristics. It differs from road diesel primarily in duty classification and permitted use.

Standards and Approvals

Gasoil aligns with diesel-type fuel specifications and is commonly referenced under EN 590 equivalence for performance characteristics. Its use is regulated and restricted to approved sectors.

Emissions Classification

Gasoil follows standard diesel combustion characteristics. Emissions performance is comparable to conventional diesel fuels and depends on engine type and operating conditions.

Chemical Composition

Gasoil is a middle distillate hydrocarbon fuel similar to white diesel. It includes additives and a red dye marker to distinguish it from road diesel and enforce regulatory compliance.

Ignition Quality (Cetane Number)

The fuel provides stable ignition performance suitable for diesel engines used in off-road machinery and heating systems, supporting consistent combustion behaviour.

Cold Flow Properties

Gasoil is supplied in seasonal grades. Winter specification typically supports a CFPP of up to -12°C, while summer grade supports up to -4°C, ensuring operability across temperature conditions.

Storage Stability

Gasoil offers stable storage characteristics under appropriate conditions, similar to conventional diesel fuels, and should be stored in suitable tanks to maintain quality.
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Supply & Delivery

MB Energy provides nationwide Gasoil supply across the UK.

- Bulk fuel delivery for commercial and industrial users  
- Flexible delivery scheduling aligned to operational demand  
- Coverage across urban and rural locations  
- Support for distributors and high-volume customers  

Our logistics network ensures that fuel is available when and where it is needed, with clear communication throughout the delivery process.

Product Benefits

Cost-efficient operation

Lower fuel duty compared to white diesel reduces operational fuel costs in permitted applications.

Widely compatible fuel

Suitable for a broad range of diesel engines used in agriculture, rail and heating systems.

Clear regulatory classification

The red dye ensures clear identification and compliance with HMRC regulations.

Flexible sector usage

Applicable across multiple industries including agriculture, marine and non-commercial heating.

Product Variants

Gasoil is available in different formulations to ensure reliable performance across seasonal conditions and operational requirements.

These variants are designed to maintain fuel flow and engine operability in varying temperatures. The primary difference lies in cold weather performance and compliance with seasonal standards.

Summer Grade Gas Oil

Standard formulation for warmer conditions - Designed for use in milder temperatures with a CFPP of up to -4°C. Suitable for general use during spring and summer months.

Winter Grade Gas Oil

Enhanced cold weather performance - Formulated for lower temperatures with a CFPP of up to -12°C. Supports reliable operation in colder environments.

FAQ

Who can use Gasoil?

Gasoil use is restricted under UK regulations. It can be used for agriculture, forestry, rail operations, certain marine applications and non-commercial heating such as schools or hospitals. Not all vehicles qualify for every use case, so eligibility should always be confirmed before use.

Are there other names for Gasoil?

Yes, Gasoil is also referred to as red diesel, 35-second oil, cherry red, tractor oil, agricultural diesel, marine diesel, marked diesel and rebated diesel. These terms all refer to the same fuel category with identical usage rules.

Can Gasoil be used as heating oil?

Gasoil can be used for heating non-commercial premises such as homes, NHS hospitals and state schools, provided the heating system is compatible. It is not permitted for commercial heating applications.

Do I need a licence to buy Gasoil?

No licence is required. However, you must declare the intended use at the point of purchase and complete an RDCO form confirming that your use complies with regulations.

Where can I buy Gasoil?

Gas Oil can only be supplied by HMRC-registered fuel suppliers. MB Energy provides nationwide supply, supported by structured delivery and customer service.

Is there a renewable alternative to Gasoil?

Renewable Diesel (HVO) is an alternative fuel option for diesel engines. It can be used as a drop-in replacement and may reduce net greenhouse gas emissions depending on feedstock and supply chain. We can provide information if you want to assess this option.

Is there a difference between winter and summer Gasoil?

Yes. Seasonal grades are used to maintain performance in different temperatures. Winter grade supports lower temperatures (up to -12°C CFPP), while summer grade is suited to milder conditions (up to -4°C CFPP).

Contact us

Discuss your Gasoil requirements with our team.  
We provide clear options, structured supply and transparent delivery planning.

Tel: 0303 003 2044

Email: uksales@mbenergy.com