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Diesel Engines AdBlue and You

It's all about Euro Standards and those nasty exhaust emissions produced by your diesel engine...

Maun Motors - Diesel Engines

Modern diesel engines fitted to vans, trucks and cars now feature "Selective Catalytic Reduction" technology (SCR) - to reduce harmful exhaust emissions to meet today's stringent Euro 5 & Euro 6 Standards.

As part of this process, diesel exhaust fluid 'AdBlue' is injected into the catalyst of the SCR system (part of the exhaust system), where it triggers a chemical reaction with the ammonia and converts the harmful toxic Nitrogen Oxides (NOx) into Nitrogen (N2) and steam (H2O). (Steam - water vapour and nitrogen are naturally occurring gasses that are harmless to the environment).

AdBlue is also known outside of Europe as DEF, ARLA 32 or AUS 32. It is a highly purified colourless liquid containing demineralised water and urea (32.5%). It is and safe to handle; non-toxic, colourless, odourless and non-flammable.

These days - Renault, Peugeot, Citroën, Volkswagen, Audi, BMW, Mercedes Benz, GM / Opel, Ford, Toyota and Mazda all produce vehicles equipped with SCR technology that requires the use of Adblue.

Ad-Blue is contained in a separate dedicated tank to the fuel and is injected directly into the exhaust gases.
It is not a fuel, nor a fuel additive. The size of the AdBlue® tank fitted to your vehicle will vary depending on which vehicle you have, therefore the interval between top-ups will vary. In addition, many factors such as mileage, journey type, driving style and environmental conditions can influence how much AdBlue® is consumed.

Maun Motors - Adblue

Important Information
AdBlue® is not a fuel additive. That is why there is a separate AdBlue® tank.
If you put AdBlue® in your fuel tank by mistake, do not start the engine, but contact your dealer for help.
Put only AdBlue® in the AdBlue® tank; do not fill the AdBlue® tank with any other liquids.
Prevent anything from contaminating AdBlue®
If small quantities of AdBlue® come into contact with the vehicle's paintwork, (for example), wipe them off and if necessary rinse the area with water.

There's some great information regarding AdBlue on the Halfords website: