Referred to Selective Catalytic Reduction (SCR) Technology, your vehicle will also have a tank for AdBlue® which you will need to fill regularly. So, how does the system work? AdBlue® is a synthetic urea-based solution, which is stored in a separate tank and injected directly into a specially modified part of the vehicle’s exhaust system. This begins a chemical reaction which removes the polluting nitrogen oxides (NOx), converting them into harmless steam and nitrogen in a process known as Selective Catalytic Reduction (SCR). SCR is only applicable to diesel engines.
The frequency of tops up may vary due to the size of the AdBlue® tank fitted to your car, journey mileage, journey type and your driving style. A passenger car will consume approximately 1 litre of AdBlue® every 500 miles but this will vary depending on your cars manufacturer. How do you know your vehicle needs a top up? There will be a series of warnings that will be given usually on your vehicles instrument cluster, accompanied by further advice/messages via the driver information system. If these warnings are not acted upon the car will not restart once the ignition is turned off. The system will need a full top-up before the car can be restarted. This is not a fault, but a required feature of the system.
