What is AdBlue?

AdBlue is an anti-pollutant, a solution consisting of 32.5% of automotive grade urea and 67.5% deionisied water. 

AdBlue (known also as diesel exhaust fluid), is added to most modern diesel engines, designed to reduce harmful emissions of nitrogen oxides (NOx) to non-hazardous gases, to comply with the latest, toughened emission standards.

AdBlue can only be used on diesel vehicles with Selective Catalytic Reduction (SCR) to help reduce their emission

What happens if I run out?

When driving a vehicle using AdBlue, you will get a message on the dashboard if the AdBlue needs to be topped up. You can do this yourself or have it done at VAR Automotive. It is important to follow up this message as soon as possible. While your vehicle will continue to run if you run out while driving, on some vehicles, it won’t allow a restart once you’ve switched off the ignition.

The location of the AdBlue reservoir varies. On some vehicles, AdBlue is stored in a separate tank, with a filler cap (usually in blue colour), next to your diesel filler cap. Make sure not to add it directly into your diesel fuel reservoir, it is better to take your vehicle to a service specialist as VAR Automotive that know what they are doing.

Does it Freeze?

Yes, and you can’t add anti-freeze agents to it as the sensors are sensitive to anything that isn’t pure diesel exhaust fluid. DEF will remain a liquid up to around -11C. Fortunately in Australia, there is little to worry about freezing.


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