AdBlue in Petrol Tank by Mistake? Signs & Solutions

Accidentally putting AdBlue in a petrol tank can cause a great deal of stress and potential damage to your vehicle. If you’ve made this mistake, it’s important to act quickly to avoid further complications. In this article, we’ll discuss the signs of AdBlue contamination, solutions to fix the issue, and how to prevent it from happening again.

What Is AdBlue and Its Purpose?

AdBlue is a urea-based solution used in diesel vehicles to reduce harmful nitrogen oxide emissions. It works with the Selective Catalytic Reduction (SCR) system to make diesel cars more environmentally friendly. While highly effective in its role, AdBlue is not a fuel and should never be mixed with petrol or diesel.

What Happens If AdBlue Is Put in a Petrol Tank?

Adding AdBlue in a petrol tank is a serious error. AdBlue is water-based and not combustible, which means it cannot mix properly with petrol. When this mistake occurs, it can result in:

Clogged fuel lines and filters
Damage to the fuel pump
Corrosion in the fuel system
Potential engine malfunction or complete failure

If AdBlue is pumped through your car’s engine, the repair costs can be significant.

Signs That AdBlue Has Been Added to a Petrol Tank

Identifying the signs early can help minimise damage. Here are the most common indicators:

1. Difficulty Starting the Engine

AdBlue contamination can cause the fuel system to fail, making it hard for the engine to start or operate smoothly.

2. Reduced Engine Performance

You may notice a lack of power or sluggish acceleration. This happens because the engine isn’t receiving the proper fuel mix.

3. Warning Lights on the Dashboard

Modern vehicles are equipped with sensors that detect fuel system issues. A “check engine” light or other warnings may appear.

4. Unusual Engine Sounds

A contaminated fuel system can cause knocking or sputtering noises as the engine struggles to operate.

Steps to Take If You Put AdBlue in a Petrol Tank

If you’ve accidentally put AdBlue in your petrol tank, follow these steps immediately to reduce potential damage:

1. Do Not Start the Engine

Starting the engine will circulate the AdBlue through the fuel system, increasing the risk of significant damage.

2. Contact a Professional Mechanic

Call a mechanic or roadside assistance service for help. Inform them about the situation so they can prepare accordingly.

3. Drain the Fuel Tank

A professional mechanic will need to completely drain and flush the fuel system to remove any traces of AdBlue.

4. Inspect for Damage

After flushing the system, the mechanic will check for any damage to fuel lines, pumps, or injectors. Repairs may be required depending on the extent of the contamination.

How to Prevent Putting AdBlue in a Petrol Tank

Mistakes happen, but they can be prevented with some simple precautions:

Use Clearly Labeled Fuel Caps
Consider purchasing a fuel cap that indicates whether your vehicle uses petrol, diesel, or AdBlue.
Double-Check Before Refueling
Take a moment to ensure you’re using the correct pump and filler nozzle.
Avoid Distractions at the Pump
Stay focused while refueling to avoid costly errors.
Educate All Drivers of the Vehicle
Ensure that anyone who drives your car knows how to refuel it correctly.

The Costs of Repairing AdBlue Contamination

Repairing a vehicle after AdBlue contamination can be expensive, particularly if the engine has been started. Costs may include:

Draining and flushing the fuel system
Replacing damaged fuel lines, injectors, or pumps
Potential engine repairs if extensive damage occurs

Prices vary based on the vehicle and the extent of the damage but can range from hundreds to thousands of pounds.

FAQs About AdBlue in a Petrol Tank

1. Can I fix this mistake on my own?

No, fixing this issue requires professional equipment and expertise to properly flush the system and inspect for damage.

2. Will insurance cover the costs?

Check your insurance policy, as some providers may cover the costs of accidental misfuelling.

3. Can driving a short distance cause severe damage?

Yes, even driving a short distance can circulate AdBlue through the engine, leading to significant damage.

Conclusion

Adding AdBlue to a petrol tank by mistake can be a costly and stressful error, but quick action can mitigate the damage. By recognising the signs of contamination and following the proper solutions, you can minimise repair costs and restore your vehicle’s performance. Always double-check the fuel type before refuelling to avoid such mistakes in the future.