What does AdBlue do?

AdBlue is a urea-based, non-toxic liquid injected into the exhaust system of modern diesel vehicles to reduce harmful nitrogen oxide (NOx) emissions. Through a process called Selective Catalytic Reduction (SCR), it breaks down up to 95% of NOx into harmless nitrogen and water vapour, helping engines meet strict Euro 6 standards.

Can I use pee instead of AdBlue?

Putting urine from any species into your machine's AdBlue tank would cause irreversible damage to the SCR.

How long will 10 litres of AdBlue last?

10 litres of AdBlue typically lasts a diesel car 600 to 1000 miles, but this varies greatly; expect roughly 1 litre per 50-100 miles depending on driving style and vehicle size, with some drivers getting 3,000 to 12,000 miles from a full tank, and a warning light signals when you're low, giving ample time to top up before the engine stops.

What does AdBlue do to your engine?

AdBlue is an aqueous urea solution that helps reduce harmful emissions from diesel engines. It is a diesel exhaust fluid (DEF) that is injected into the exhaust system of diesel vehicles to reduce nitrogen oxide (NOx) emissions.

Is AdBlue made out of pee?

FACT: Many people believe that the urea in AdBlue® is made of pig urine. It isn't! The urea used to make AdBlue® is a man-made solution. Pig urine wouldn't be sterile or pure enough for a commercial product!

Ad Blue - What is it and how to use It

Can I fill up AdBlue myself?

Attach an anti-spill nozzle to the AdBlue® container. If you do not have an anti-spill nozzle to hand, remove the AdBlue® tank cap and place a funnel in the top of the reservoir. Slowly refill the AdBlue® tank until it is full. Some vehicles require a dashboard reset after a top-up to remove the AdBlue® warning light.

Will removing AdBlue fail MOT?

DISCLAIMER: Deleting and removing Adblue from a vehicle will deem it illegal for road use and can fail an M.O.T.

Can I overfill my AdBlue tank?

The AdBlue pump and circuitry are located on top of the tank in some cars. Overfilling, therefore, risks moisture contamination that can damage the electrical system.

Why is my AdBlue running out so fast?

There's a fault with a sensor, pump, or injector in the system. There's a corrupt signal or error code in the car's computer. The system simply needs to be reset after a repair.

Is AdBlue pig urine in the UK?

There's a rumour that AdBlue is just pig wee, but that's not really the case. AdBlue is made of urea, a substance found in urine, and deionised water. All AdBlue is made to an international standard (32.5% urea and 67.5% deionised water), so there's no difference between brands or supermarket AdBlue.

Can I use tap water instead of AdBlue?

No! Even though AdBlue is made up mostly of deionised water, you cannot use water as a replacement.

What does pig urine contain?

The pig urine which is separated primary from the solid manure contains most of the nitrogen and potassium, while the phosphorus is mainly found in the solid manure. The N/P ratio is high. Therefore the pig urine is suitable as a good fertilizer without being phosphorus limited.

Is low AdBlue an MOT failure?

Diesel vehicles

If you drive a diesel vehicle, there are two other major issues that could result in an MOT failure. The first is the AdBlue warning light. If you don't have enough exhaust fluid the light will come on. As this is a dashboard light, your vehicle will fail.

Can you legally delete AdBlue?

Legal disclaimer: It is illegal to tamper with emissions devices for road registered vehicles.

Can a lorry run without AdBlue?

If you run out of AdBlue during your journey, it will only drive at limited engine performance. Once you switch the engine off, the lorry will not restart until you have refilled the AdBlue tank.

What happens if I put water in instead of AdBlue?

Even before engine damage occurs, using water instead of AdBlue® will also increase fuel consumption and cause your vehicle to break emissions reduction rules. As such, if you do mistakenly use water instead of AdBlue®, do not start your engine and contact a professional.

What is AdBlue made of?

AdBlue is a biodegradable, completely harmless solution designed to help diesel vehicles meet the latest Euro exhaust emissions regulations. AdBlue is made from 32.5 percent urea and 67.5 percent deionised water. You may have seen rumours that it contains pig's urine, but that is factually incorrect.

Is AdBlue delete illegal in the UK?

No, an AdBlue delete is illegal for vehicles used on public roads in the UK, as it's considered tampering with an emissions control system, leading to potential MOT failure, fines, invalidated insurance, and legal action. The law requires AdBlue systems to remain functional for compliance with emissions standards like Euro 6, though some services offer deletes for off-road, export, or motorsport vehicles where emissions laws don't apply. 

Can you pass an MOT with no DPF?

A DPF check has been part of the MOT test since February 2014. If a filter has been removed, the car should fail its MOT.

Does AdBlue clean the engine?

Improved Efficiency – By reducing NOx emissions, AdBlue helps improve engine efficiency and performance. Longevity of DPF System – AdBlue works alongside your DPF to ensure the exhaust gases are cleaner, reducing the harmful particles that cause DPF blockages.

Will Halfords top up my AdBlue?

Halfords trained experts will check your AdBlue levels. Safely refill the AdBlue tank to the appropriate level. Ensures your vehicle continues to run efficiently and remains environmentally friendly.

Can I drive straight after adding AdBlue?

AdBlue® in your fuel tank can result in significant damage to the fuel tank, pump and injection system – it'll need draining and refilling before you can start the ignition. If AdBlue® has made its way into the diesel tank, call us straight away.

What is the fastest way to ungel diesel fuel?

Heat is the most effective way to ungel diesel fuel.