If you have recently purchased a relatively new diesel car, there’s a chance that you might be curious about what the secondary cap under your fuel cover is for, and the answer is AdBlue. To keep your vehicle as green as possible, it is more than likely fitted with an SCR system, which eliminates many of the noxious gases found in your exhaust fumes.
As there is a lot to do with your car that depends on this product, we’ve decided to take a closer look at it and how it can affect your vehicle. Read on to find out the four essential things that you need to know about AdBlue.
What Is AdBlue and why is it so important?
AdBlue is the substance used by this system to turn these pollutants, which include nitrogen oxide (NOx) and carbon monoxide (CO), into less harmful outputs, such as nitrogen and water vapour. In basic terms, the AdBlue works through a chemical reaction that occurs when it is injected into the catalyst of the SCR system, where its heavy ammonia content reacts with harmful elements to create a more environmentally friendly end product. You can find out more about the inner workings of an SCR system in this guide from Diesel Forum.
The reason that SCR systems and their AdBlue input are so essential in diesel engines is because they allow these vehicles to comply with strict EU emissions regulations, known as Euro 6. Issued in 2015, these rules place limits on the level of pollutants allowed to be outputted by cars and other types of transport. SCR systems play a key role in helping car manufacturers reach these targets, and will also play an important part in your diesel car’s performance and maintenance in the years to come.
How do I know if my car needs AdBlue?
As we’ve already mentioned, almost all new production diesel vehicles will have an SCR system, and consequently require AdBlue to function. The easiest way to confirm whether your car needs it is to take a look at your fuel tank — if there is a secondary, smaller cap that is black or blue in colour near to your main fuel cap, then you will need AdBlue. This cap is often labelled clearly with the product’s name to avoid confusion. You can also check your owner’s manual, which should detail whether there is a SCR system in your car and what exactly needs to be done to maintain it.
When do I need to re-fill my car with AdBlue?
Every time that you use your car you will be using up AdBlue, as it is used to reduce harmful emissions on a day to day basis — though you won’t burn through it as quickly as you do fuel. How much you use will generally depend on what type of vehicle you are driving, how often you use it, and the distance that you travel. You can prolong your supply by practising efficient driving, which will also save you money by reducing your fuel consumption. The AA has some tips for improving your driving efficiency that can be very effective.
Many manufacturers will recommend that your AdBlue will usually only need to be refilled each time your car is due a servicing, and this will probably be true for most people. Again, it depends on a number of factors, but if you find yourself running out, you can easily top up your tank yourself. New diesel cars will likely have an on-board information system that will tell you when you are running out — check your manual to find out if your car has this and how it works.
Source: Tyre Blog