FAQs Answered

AdBlue, also known as Diesel Exhaust Fluid (DEF), is a vital component in modern diesel engines equipped with Selective Catalytic Reduction (SCR) systems. Its role in reducing harmful emissions is crucial for meeting stringent environmental standards. This article answers common FAQs to help you understand why diesel engines need AdBlue and how it benefits both your vehicle and the environment.

1. What is AdBlue?

AdBlue is a non-toxic, colorless liquid made up of 32.5% urea and 67.5% deionized water. It is injected into the exhaust stream of diesel engines equipped with SCR technology to reduce nitrogen oxide (NOx) emissions.

2. Why is AdBlue Necessary for Diesel Engines?

AdBlue is essential for modern diesel engines to meet stringent emission standards. NOx gases produced by diesel engines are harmful to human health and the environment. AdBlue, when combined with SCR technology, converts these harmful gases into harmless nitrogen and water vapor, significantly reducing pollution.

3. How Does AdBlue Work?

AdBlue is injected into the exhaust system, where it reacts with NOx gases in the SCR catalyst. The chemical reaction breaks down NOx into nitrogen (a harmless gas) and water vapor, thus reducing emissions effectively.

4. Which Vehicles Require AdBlue?

Vehicles with SCR systems will require AdBlue for proper operation. AdBlue is used in a wide range of diesel vehicles, including:

• Trucks and buses
• Diesel Passenger cars
• Agricultural machinery
• Construction equipment

5. How Often Do I Need to Refill AdBlue?

A typical diesel engine needs enough AdBlue to match 4-6% of the amount of diesel it uses. In other words, the engine needs 4-6 litres of AdBlue for every 100 litres of fuel it consumes. AdBlue consumption is quite consistent and predictable, making it easy for you to forecast how much you need regularly.

6. What Happens if My Vehicle Runs Out of AdBlue?

Your vehicle may enter a limp mode, restricting performance. Most modern vehicles will not restart until AdBlue is refilled. Increased emissions, which could result in regulatory penalties. Always refill AdBlue before it runs out to avoid these problems.

7. Can I Use Water or Other Fluids Instead of AdBlue?

No. AdBlue is specifically formulated to work with SCR systems. Using water or other substitutes can damage your vehicle’s SCR system, increase emissions, and void your warranty. Always use certified AdBlue that meets ISO 22241 standards.

8. Does AdBlue Expire?

Yes, AdBlue has a shelf life of about one year if stored correctly. It should be kept in a cool, dry place away from direct sunlight and extreme temperatures. Degraded AdBlue can affect your vehicle’s performance and SCR system.

9. Is AdBlue Harmful or Dangerous?

AdBlue is non-toxic and safe to handle. However, it can be corrosive to certain metals and materials. If it spills on your skin, wash it off with water. Avoid ingesting or inhaling AdBlue.

10. Can I Reuse AdBlue from Roadside Containers?

It is not recommended to use AdBlue from roadside IBC tanks or containers of unknown quality. Counterfeit or contaminated AdBlue can damage your SCR system. Always purchase AdBlue from trusted suppliers.

11. How Can I Store AdBlue?

To ensure AdBlue remains effective:
Store it in a cool, dry place between -11°C and 30°C. Keep it in sealed, opaque containers to protect it from sunlight. Avoid contamination by keeping storage areas clean.

12. Is AdBlue Expensive?

The cost of AdBlue is relatively low compared to its benefits. While prices vary, it is a small expense for maintaining regulatory compliance and reducing emissions.In India, cost is around 65/litre,pretty much same of all companies.

13. How Do I Know If AdBlue is Working?

Your vehicle’s onboard diagnostics system monitors AdBlue usage and SCR performance. If there’s an issue, a warning light or message will appear on your dashboard.