What is AdBlue and does your diesel car need it

If you own a diesel car, you might have heard of AdBlue, but you might not know exactly what it is and whether your vehicle needs it. In this article, we will explore AdBlue, what it is, how it works, and whether your diesel car needs it.

What is AdBlue?

AdBlue is a clear, non-toxic, and non-flammable solution that is used in diesel engines to reduce harmful emissions. It is a registered trademark of the German Association of the Automotive Industry (VDA) and is manufactured to a specific standard called ISO 22241.

How does AdBlue work?

AdBlue works by converting harmful nitrogen oxides (NOx) into harmless water vapor and nitrogen gas. It does this by injecting a precise amount of AdBlue into the exhaust system, where it reacts with the NOx in a process called Selective Catalytic Reduction (SCR). The SCR catalyst then breaks down the NOx into water and nitrogen, which are released harmlessly into the atmosphere.

Does your diesel car need AdBlue?

If you own a modern diesel car or light commercial vehicle (LCV) that meets the Euro 6 emissions standard, it is very likely that it will require AdBlue. Euro 6 is a set of emissions standards that were introduced in 2015 to reduce NOx emissions from diesel engines. The Euro 6 standard sets a limit of 0.08 grams of NOx per kilometre driven for diesel cars, which is a significant reduction from the previous Euro 5 standard.

AdBlue is required for diesel engines that use SCR technology to meet the Euro 6 emissions standard. Most diesel engines in Europe use SCR technology, so if you own a diesel car or LCV that was registered after September 2015, it is very likely that it will require AdBlue.

How do you know if your diesel car needs AdBlue?

If your diesel car requires AdBlue, it will have a separate AdBlue tank located next to the fuel tank. The AdBlue tank is usually smaller than the fuel tank and has a blue cap to distinguish it from the fuel cap. The dashboard will also have an AdBlue level indicator, which will warn you when the AdBlue level is low and needs to be topped up.

Where can you buy AdBlue?

AdBlue can be purchased from most petrol stations and automotive stores. It is usually sold in 5-liter or 10-liter bottles, or in larger containers for commercial vehicles. You can also purchase AdBlue online or from a dealership.

In conclusion, AdBlue is a solution that is used in modern diesel engines to reduce harmful emissions. If you own a diesel car or LCV that was registered after September 2015, it is very likely that it will require AdBlue to meet the Euro 6 emissions standard. If your car does require AdBlue, it will have a separate AdBlue tank located next to the fuel tank, and the dashboard will have an AdBlue level indicator. AdBlue can be purchased from most petrol stations and automotive stores, or online.

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IMI Certified Tuning Specialist

MPG Tuning Ltd
Unit 44 Rumerhill Business Estate
Cannock, Staffordshire, WS11 0ET


 Tel: 01543 466662


MPG Tuning Offer Professional ECU Remap and Tuning services including but not limited to ECU Remapping, EGR Delete, DPF Solutions, VAG Emissions Recall Scandal Rollback, Tricore Processor Programming, Boot Mode, and Traditional Chip Tuning.

MPG Tuning is based in Cannock Staffordshire but serves customers from further afield typically from the following areas, Lichfield, Burntwood, Rugeley, Stafford, Brownhills, Walsall, Wolverhampton, Birmingham, Tamworth plus many more areas throughout the West and East Midlands.

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Choosing a Good Tuner is as important as choosing a Good Doctor.

You will be presented with a bewildering selection of companies, all claiming to be the best in the industry. Unfortunately the industry has been flooded with “Get Rich Quick” merchants all desperate to take your money from you. In many cases the “Get Rich Quick” operators have invested in “Cloned” counterfeit remapping tools off the internet. They have little “if any” industry knowledge, experience or liability insurance…

Don’t get sucked in by a good story and what appears to be an incredible price. Instead of taking the word of self-acclaimed tuning experts, a search on google will reveal some very interesting, yet disturbing facts about a few “so called” professionals. Unlike some testimonials “Bert for Bognor says we are Brill” our customers are real people. Don’t take our word for it, ask the people that know best “Our Customers”

I went for a remap on my T5 as it had an awful flat spot around 2800 rev's I got great personal service and its like having a new engine in the van smooth power and greater economy.... Highly recommended wish I'd done it months ago it would have paid for it self already thanks a lot hills are no longer a drag.

Adrian McManus

Popped in to see Mike on Friday to have my A4 2.0TDi 170hp remapped. Have to say I was a little pessimistic at first having being told by another firm that remaps on these were a nightmare so was expecting the worst! Thankfully, nothing of the sort, straight in, one error message unknown but Mike worked it out and all done in no time. Straight out for a test run and the drive is very different, certainly mid ranged (where these engines seem to suffer) pulls away nicely and can definitely feel the benefit. Best money I've ever spent on a car in, well, forever! Thanks again Mike

Mark Patterson

Had the ECU my 320D remapped by Mike yesterday. Very impressed with the results. Noticed it straight away after having it done. Service was also great, talked me through all of it to get exactly what I wanted out of it. Highly recommend mpg tuning.

James Aston

Took my Civic Mk VIII 2.2 CDTI to Mike following a recommendation from a friend who's had his last few cars remapped at MPG., professional service and answered any questions I had. Customised remap that gave me a good balance between performance and economy. Mike was happy to let me watch the whole procedure and explained what he was doing. Makes a good brew as well! Would highly recommend, Will definitely bring my future motors here.

Dan Wright

Just had the ECU on my BMW 320D remapped and it is absolutely superb the power is unbelievable and the service is outstanding would recommend it to anybody he has transformed my car from 160 bhp to 207 bhp no smoke at all and the power delivery is awesome throughout all of the gears really happy.

Tom Dawson

Had my Astra 1.9cdti remapped here with EGR delete for a great price, I have now got the full power and yes it's rapid lol.... Mike was helpful and talked me through it all and also good after care as well. Thanks again.

Scott Walker

Had my T5 remapped today. Over the moon with the results! Really reasonable price and customer service is second to none! Would highly recommend!

Ethan Tunnicliffe

I had my car remap done and I'm really pleased with MPG Tuning. Great atmosphere, great service and I will recommend it to all my friends. Thank you once again. Renault Megane 2.0 Turbo petrol with 165 hp standard

David Wojtasik

Took my Astra estate for a ecu remap, excellent job feels a lot more responsive!

Umair Khalid

Mike remapped my car. Perfect professional service from start to the end. For less than 2 hours everything was done. If you want a different feeling when you are driving MPG Tuning is your place to go.

Dimitar Dimitrov

My boyfriend has exactly the same car as me 1.5 diesel fiesta, had his remapped and was over the moon with it. I had never thought of having a car remap but after driving his, mine felt heavy and slow so decided to get mine done too, now I am converted I love it even more and I am getting about 80-90 miles per tank better than before, very happy , great friendly service and awesome cuppa while we waited

Kelly Williams

Had my renault van remapped at mpg tuning, awesome power, can now keep up with pigeons, thanks Mike for an excellent job 👍👍



Our lead technician has over 16 years’ experience in the tuning industry and long term connections with some of the Worlds most experienced data programming and tuning specialists. We are extremely passionate about our customer satisfaction and strive for a perfect result every time.

Contact MPG Tuning today to discuss options for a professional ECU remap or Call Us: 01543 466 662