As you will know from checking out our articles on various car ranges, there are two major traditional fuel resources for cars. One of those is petrol, and the other is the stronger diesel power, which gives the vehicles in question an extra burst of force on the road. But with that comes increased emissions of nitrogen oxides (NOx) into the airwaves. And although modern cars are designed to reduce the amount of air pollution caused by its engine, there has to be some sort of a compromise when it comes to motors which still require diesel in order to properly function on the road. Amongst the options available is AdBlue, which we will now discuss in further detail.

What Is AdBlue?

The concept of using AdBlue is a relatively recent trend, and one that has gathered steam fairly quickly over the past few years. At its core, AdBlue is a form of liquid urea solution, consisting of around a third of urea mixed with around two-thirds of deionized water. AdBlue essentially acts as an exhaust fluid for diesel engines within cars. In 2005, new legislation within the United Kingdom (and within the European continent as a whole, actually) ruled that car manufacturers had to find way to significantly reduce NOx emissions due to the damage being done by diesel engines sending out nitrogen oxide into the environment. Although car companies have and continue to find ways to utilise diesel engines while ensuring that NOx is not as widespread as it previously had been, there is still an unbreakable link between the two, which is where AdBlue serves its primary purpose.

what is ad blue or urea


What Does AdBlue Do?

As noted, AdBlue is designed to reduce nitrogen oxide emissions, but how is this achieved? Simple: the AdBlue is poured into the exhaust gas, thus turning the NOx into nitrogen and steam, which are much less impactful upon the surroundings of the vehicle. This is highly recommend for all owners of diesel powered vehicles, but it is particularly suggested for those who drive large-scale lorries and vans, many of which travel across the country and onto ships due to them storing goods. For those trips, the vehicles need significant power, hence them relying on diesel, but this has also resulted in massive amounts of NOx entering the climate. Therefore, the benefits of AdBlue are most noticeable for these hefty vehicles, and the difference is no change whatsoever in the general driving experience, but a major, positive change for the environment, especially when a company has a fleet of these motors heading to and from specific locations on a regular basis.

How Often Are Refills Needed?

AdBlue can last for a long time within an engine, and it ultimately depends on how often the vehicle will be used in terms of the frequency of further refills. It is generally suggested that after every 10,000 miles, AdBlue should once again be refilled and inserted into the exhaust pipe of the vehicle. For a standard driver who clocks up around 8,000-9,000 miles per year, it is more or less an annual occurrence for them to have to refill with AdBlue, meaning that it is irregular enough but it is more than worthwhile to ensure the larger value of keeping the environment safer for all. In terms of larger vehicles, the same mileage recommendation applies, but chances are that the motorists will find themselves having to refill a couple of times per year given their increased and more extensive travels. In a nice touch, modern cars are able to alert drivers when the vehicle is running low on this fluid (in exactly the same way as it would point out a lack of general fuel), meaning that the driver will find out when it is time to refill as opposed to it reaching a stage where, all of a sudden, there is no AdBlue remaining in the exhaust gas.
How Often Are Ad blue and urea Refills Needed

Popular Car Brands Using AdBlue

That is partly because, with many cars in 2020, the vehicles themselves come with the AdBlue and/or provide detailed information about how to obtain it. Amongst the leading manufacturers who recommend and utilise AdBlue are Mercedes-Benz, Audi and BMW, but these are just a small selection of the organisations that use AdBlue. It goes without saying that whilst AdBlue is part of the package for more common cars that we see on the road all the time, it is for the large-scale vans and multi-wheel vehicles that AdBlue reaches a higher level of priority, and so virtually every manufacturer producing such machines for motorists also include AdBlue and related guidance for using it.


The automotive world is always evolving, and sometimes changes are made so subtly that drivers accept them without thinking to understand where they came from and why they were made. The insertion of AdBlue into the everyday management of a diesel powered vehicle is amongst those occurrences, because over the past 15 years, it has become so normalised to take further steps towards maintaining a safer diesel engine for such vehicles that very few motorists have probably taken the time to learn why they have to apply this exhaust fluid. And yet it was and remains incredibly important, especially right now when climate change and the debates on the most appropriate steps forward are widespread within broadcast and print news coverage. Diesel engines will still be more likely than petrol engines to cause emissions into the environment, but the amount of nitrogen oxide entering the airwaves has thankfully decreased and is continuing to decrease due to the influence of exhaust fluid, and the most popular form that you will find is AdBlue.

Learn more about diesel cars running on AdBlue by visiting on this stock page link www.accept-car-finance.co.uk.