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So what exactly is AdBlue®? image

So what exactly is AdBlue®?

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First, let’s explain what really AdBlue® is…

AdBlue® is a liquid, a clear solution comprising purified water and automotive urea (32.5%). AdBlue® is injected into the exhaust gasses of a diesel-powered engine to reduce, in combination with Selective Catalyst Reduction ( SCR) technology, nitrogen oxide (NOx) emissions. Hot exhaust gasses turn AdBlue into ammonia and, in the catalyser, the ammonia neutralises harmful NOx and converts it into nitrogen and H2O (steam).

What is purified water? It isn’t like the drinking water which comes out of your taps at home. It is water that has been demineralised or deionised. So, to make AdBlue, you just add urea to water? Well, no, it’s a bit more complicated than that…!

The same goes for urea. It is manufactured specifically for AdBlue production. Few suppliers can produce the high quality urea needed to ensure AdBlue complies to the stringent ISO 22241-1 specification.

That was the technical part! In practice, AdBlue® is a solution that helps clean up the NOx particles that your diesel car, van, truck or bus releases into the air.

Since January 2016 AdBlue® is compulsory on most diesel engines, from generators to the biggest non-road vehicles.

AdBlue tanks are not always where you expect them to be!

We have been talking about AdBlue® and legislation since the beginning of this article and, by now, you must be thinking: “Where on earth can I find the AdBlue® tank on my vehicle?”

Well, first of all, it depends if your vehicle is a diesel or not. You need a diesel car to use the “NOx killer”. Most of our #truckers friends have been using AdBlue® since 2006, which is over a decade, so they pretty much know where to find it. But what about cars?



Well, before we take a look at cars, did you know that today’s trucks pollute less than ten-year-old diesel cars? The law requires trucks to emit fewer than 0.4g/kWh. Considering the vast number of trucks on our roads today to satisfy the demands of the flourishing mail-order market, this is welcome news for our planet!

The recent EURO 6 legislation requires a diesel car to emit fewer than 0.08g/km of NOx.

Now let’s take a closer look at cars. A car built in 2000 (just 16 years old) releases more than 0.56g/km of NOx. Today, EU law requires cars to emit fewer than 0.08g/km of NOx. Without a doubt, this is an impressive improvement in such a short space of time.

Car manufacturers were first asked to demonstrate in laboratories that they could develop engines capable of meeting these emission levels and it is only from September 2017 that road tests will be carried out to verify that they can actually do it.

In practice, AdBlue® needs to be injected at a specific dosage, based on engine speed and load. Today, cars are designed to be as light as possible in order to reduce CO2 emissions. Car manufacturers, therefore, need to reduce the size of some components – the AdBlue® tank included. This is why it is fairly small and you have to fill it several times a year.

For any given model of car, diesel versions emit less CO2 than petrol ones!

For example, if you drive long distances regularly, a 2016 diesel-engine Peugeot 3008 car would emit less CO2 (100 g/km) than the petrol version (around 117g/km)… This is a fact and you definitely need to take it into consideration when looking for a car. Also check what is the overall pollution generated when manufacturing an electric car compared to a petrol or diesel one. You need some really special materials to make the battery and they pollute a lot more than you think.


So, back to our subject: “How do I top up the AdBlue® tank?”  To cut a long story short, vehicle manufacturers tend to position the AdBlue® tank in the same place so, in most cases, you will see a blue cap next to your diesel filler cap. However, you might find the AdBlue® filler cap in other places too, perhaps under the carpet in the boot or on the opposite side of the car to the diesel filler cap. So check your vehicle manual to be sure you fill the right tank!

With only 2,400 km left before the car stops, you better top up your AdBlue® tank



Now, you know where your AdBlue® tank is! That’s great! But what about filling it? Many options are available. When the AdBlue® light comes on (note, you only have 2,400 km left before your car stops), you can ask your garage to top up your AdBlue® tank… Another option, which might be more convenient for long-distance drivers, is to buy it in cans from service stations. You can find GreenChem AdBlue®4you in many stations today.

Retailers generally stock many different AdBlue® solutions at various prices. Always keep in mind that this is an ISO-certified product and that this must be written somewhere on the product packaging. GreenChem markets 4 litre cans, which are convenient for most cars. They feature a special non-drip spout which prevents AdBlue® spillage. In the not-too-distant future AdBlue® pumps will be appearing in service stations. This will also make life a lot easier!

Now that you have the basic information, just drive and top up your AdBlue® tank when required! For more information about AdBlue®, contact our local subsidiary. They will be delighted to hear from you and can tell you everything you need to know about our products!

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