Since , the British Standard for Industrial Fuel Oils, BS, contains two grades of Gas Oil; Class A2 & Class D. The Class A2. Gas Oil BS Class A2. Gas Oil is a distillate fuel manufactured to give clean burning, maximum heat output and efficient combustion in boilers and off-road. Free download of BS – the fuel specification data sheets for Red diesel, gas oil and Red Diesel / Gas Oil 10ppm Specification Sheet (BS Class A2).

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For further information on the fuels supplied by Crown Oil, please see our fuel products page. In an update was made in the UK to British Standard BS for gas oil red diesel requiring a limit of 10mg of sulphur per kg fuel for mobile off-road equipment.

What is Gas Oil? CPS Fuels Information Sheet

A lot of the confusion around Gas Oil, and the variety of different names, has come both from its variety of different uses, and changes to product specification over the last few decades.

A European Fuel Quality Directive was set out in which stated that as of 1st Januaryall non-road mobile machinery should only contain up to a maximum of 10 milligrams of sulphur for every kilogram of fuel used 10 ppm or 0. As Gas Oil is a form of diesel it can be used in diesel engines to provide propulsion or generation. It has many different names in the UK and a variety of uses. There are two recognized standards of Gas Oil that are currently in use: What’s the British Standard for Gas Oil?

Class A2 has a maximum sulphur content of 10ppm and is used for off road vehicles and equipment, while Class D has a maximum sulphur content of ppm and can only be used for heating or static generators. Gas Oil is permitted for use in Tractors, hence Tractor Diesel, and on Farms, hence Farm or Agricultural Diesel, and is marked with a red dye to reflect this.

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Gas Oil has a lower cetane rating, so may have a lower energy yield than the DERV vehicle diesel alternative. John Deere, in particular, specify that fuel used within their engines must comply with the higher BS EN white road diesel fuel specification in order to guarantee performance and avoid invalidating warranties.

It can be vs2869 It was introduced to partner the European emission standards as part of the drive for a cleaner environment.

Sulphur Limits on Fuel Explained | Crown Oil UK

EN is the current standard for all automotive diesel fuel sold in the European Union member states. If you continue without changing your settings, we’ll assume that you are happy to receive all cookies on our website. It has a high calorific value heat content and is thus recommended as a boiler fuel in industrial or agricultural installations with pressure jet burners e. The higher the cetane rating the shorter the ignition delay.

However, if you would like to, you can change your cookie settings at clase time. Since white road diesel DERV was already ULSD compliant at this time, it is often believed that the specifications for red diesel and white diesel have been identical since the claxs change, but claass potential for the two differences — vs2869 and bio components remain.

The sulphur content for class A2 diesel is 0. In the Government changed their legislation as a result of EU pressure to decrease off sb2869 emissions. We use bs28699 to ensure that we give you the best experience on our website. So init became a requirement that all fuel used in off-highway mobile machinery must comply with EU Ultra Low Sulphur Diesel ULSD regulations, and must therefore contain no more than 10mg of sulphur per kg of fuel.


Sulphur was identified as one of the most harmful components of Gas Oil, but was historically needed as a lubricant within the fuel. The Class A2 specification is suitable for both diesel engines and furnace applications whilst the Class D specification is only suitable for furnace applications such as boilers, dryers and roadstone coating plants, but not suitable for diesel engines.

Both our suppliers, and CPS Fuels, reserve the right to alter the specification without notice. The red dye contains chemical markers in accordance to Customs and Excise requirements and so its illegal use can be easily detected.

Gas Oil is a middle distillate liquid refined from crude oil. There are just two of the reasons why there has been a need to significantly reduce the sulphur contents of fuels. The red excise marker in red diesel is present to show that the fuel is subject to a bs2689 taxation category to the one which is applied to diesel white diesel used in road vehicles.

This is one of the main reasons why red diesel is lower in cost when compared to road diesel. Why is Gas Oil Red? Nothing on this specification, or in this article, constitutes a guarantee. We will expand on this later. Class A2 covered all off-road clzss, including trains and tractors.