Many vehicle owners may wonder what happens when AdBlue is mixed with petrol, how to prevent misfuelling, and what steps to take if a mistake occurs. This guide will explain the impact of AdBlue on a petrol engine, the dangers of contamination, and how to handle such situations properly.
Contents
- 1 Understanding AdBlue and Its Intended Use
- 2 What Happens If You Put AdBlue in a Petrol Engine?
- 3 How to Prevent AdBlue Misfuelling in Petrol Engines
- 4 What to Do If You Accidentally Put AdBlue in a Petrol Engine
- 5 The Risks of AdBlue Misuse in Petrol Vehicles
- 6 Additional Best Practices for Handling AdBlue
- 7 FAQs
- 8 Conclusion
Understanding AdBlue and Its Intended Use
Before discussing its effects on petrol engines, it’s crucial to understand what AdBlue is and how it functions in diesel vehicles.
What Is AdBlue?
AdBlue is a liquid solution made up of 32.5% high-purity urea and 67.5% deionized water. It is not a fuel additive but a fluid injected into the exhaust system of diesel vehicles to break down nitrogen oxide (NOx) emissions into harmless nitrogen and water vapor.
Since AdBlue is specifically designed for use in diesel engines with SCR technology, it has no purpose in a petrol engine and can lead to severe damage if introduced incorrectly.
Why Is AdBlue Used in Diesel Engines?
Diesel engines produce high levels of NOx emissions, which are harmful to the environment. AdBlue plays a vital role in reducing these emissions through the SCR system. Without AdBlue, modern diesel vehicles cannot meet emission standards and may enter limp mode or shut down entirely.
Petrol engines, on the other hand, do not require AdBlue because they naturally produce lower NOx emissions. This means that adding AdBlue to a petrol vehicle serves no functional purpose and can cause significant mechanical issues.
What Happens If You Put AdBlue in a Petrol Engine?
Adding AdBlue to a petrol engine is a serious mistake that can cause engine failure, fuel system damage, and expensive repairs.
Immediate Effects of AdBlue Contamination
Since AdBlue consists mainly of water and urea, it is highly corrosive to fuel system components. When mixed with petrol, the following issues can occur:
- Clogging of fuel lines and injectors – AdBlue does not mix with petrol and can form a gel-like substance, blocking critical engine components.
- Corrosion of metal parts – The water content in AdBlue can cause rust and damage to fuel pumps, injectors, and other engine components.
- Engine misfires and stalling – Contaminated fuel disrupts combustion, leading to rough engine performance or total failure.
Long-Term Consequences of AdBlue in Petrol
If AdBlue enters the petrol tank and the engine is started, it can spread throughout the system, leading to:
- Complete fuel system failure – Injectors, pumps, and filters may need replacement.
- High repair costs – The entire fuel system might require flushing or replacement, costing thousands of dollars.
- Vehicle breakdown – If AdBlue is not removed quickly, the car may become undrivable, requiring towing and extensive repairs.
Even a small amount of AdBlue can cause major mechanical problems, making it critical to avoid misfuelling.
How to Prevent AdBlue Misfuelling in Petrol Engines
To avoid the costly mistake of adding AdBlue to a petrol engine, vehicle owners should take proactive measures.
Checking Labels and Filler Caps
Most modern vehicles have clearly marked filler caps for fuel and AdBlue. Before refilling, always:
- Double-check the labels on the fuel and AdBlue tanks.
- Ensure you are using the correct nozzle at fuel stations.
- Be aware that AdBlue filler caps are often blue and smaller than fuel caps.
Using Proper AdBlue Refilling Techniques
To prevent errors, follow these refilling best practices:
- Use dedicated AdBlue refilling equipment, such as sealed bottles with built-in spouts.
- Never store AdBlue containers near petrol cans to avoid confusion.
- If unsure, consult the vehicle manual for proper filling instructions.
Taking these precautions can help prevent costly misfuelling mistakes.
What to Do If You Accidentally Put AdBlue in a Petrol Engine
If AdBlue is mistakenly added to a petrol engine, immediate action is required to minimize damage.
Do Not Start the Engine
The most important step is to avoid turning on the ignition. Starting the engine will circulate AdBlue through the fuel system, making repairs more complex and expensive.
Seek Professional Assistance Immediately
If AdBlue has been added to the petrol tank:
- Do not start the vehicle – This prevents fluid from spreading.
- Call a mechanic or roadside assistance – A professional will need to drain and clean the fuel tank.
- Flush the fuel system – A technician may need to replace fuel lines, injectors, and filters to remove contamination.
Prompt action can save thousands in repair costs and prevent long-term engine damage.
The Risks of AdBlue Misuse in Petrol Vehicles
Misusing AdBlue in any way can lead to significant problems, not just in fuel tanks but also in other vehicle components.
AdBlue Crystallization in the Engine
If exposed to high heat within a petrol engine, Adblue crystallization happens and blocks fuel lines, causing severe engine performance issues.
Damage to Fuel Pumps and Sensors
Since AdBlue is corrosive to metals, prolonged exposure can damage fuel pumps, oxygen sensors, and other delicate components, leading to engine failure.
Avoiding improper AdBlue usage ensures the longevity and efficiency of your vehicle.
Additional Best Practices for Handling AdBlue
Proper handling of AdBlue ensures it remains effective and prevents accidental misuse.
Storing AdBlue Correctly
To maintain AdBlue quality:
- Keep it in a cool, dry place, away from direct sunlight.
- Store it in original sealed containers to prevent contamination.
- Avoid mixing AdBlue with any other fluids.
Checking AdBlue Expiry Dates
AdBlue has a shelf life of 12 to 24 months. Using expired AdBlue can reduce efficiency and damage SCR systems in diesel vehicles. Always check the expiry date before use.
FAQs
What happens if I put AdBlue in a petrol engine?
AdBlue does not mix with petrol and can clog fuel lines, corrode metal parts, and cause engine failure.
Can a petrol engine run if AdBlue is added?
No, even a small amount of AdBlue can severely damage the fuel system, preventing the engine from running properly.
What should I do if I put AdBlue in my petrol tank?
Do not start the engine. Contact a mechanic immediately to drain and flush the fuel system.
Is AdBlue a fuel additive?
No, AdBlue is not a fuel additive. It is only used in diesel vehicles to reduce emissions.
Where can I buy high-quality AdBlue?
You can purchase premium AdBlue from Azure Chemical, ensuring purity and compliance with emissions standards.
Conclusion
AdBlue is designed exclusively for diesel engines with SCR systems and should never be added to a petrol engine. Misfuelling with AdBlue can cause severe mechanical damage, leading to expensive repairs. By taking preventive measures and handling AdBlue correctly, vehicle owners can avoid costly mistakes and keep their engines running smoothly.
At Azure Chemical, we provide high-quality AdBlue that meets ISO 22241 standards, ensuring safe and efficient performance. Contact us today for premium AdBlue solutions that support clean and efficient diesel engine operation!
