What to Do If You Accidentally Put Unleaded Fuel in a Diesel Tank in Essex

Putting the wrong fuel in your vehicle is a common mistake that can cause serious damage and stress. If you have accidentally put unleaded petrol in a diesel tank while in Essex, it’s crucial to act quickly and correctly to minimize harm to your vehicle. This guide explains what happens when unleaded fuel enters a diesel engine, the immediate steps you should take, and how to get your vehicle back on the road safely.

Diesel fuel nozzle in vehicle tank in Essex

Why Putting Unleaded Fuel in a Diesel Tank Is a Problem

Diesel engines and petrol engines operate differently and require different types of fuel. Diesel fuel acts as a lubricant for the engine’s fuel pump and injectors. Unleaded petrol, on the other hand, is more volatile and does not provide the same lubrication. When petrol enters a diesel engine, it can cause:

• Damage to the fuel pump due to lack of lubrication

• Corrosion and wear in fuel injectors

• Engine misfires or failure to start

• Potential long-term engine damage if the vehicle is driven with the wrong fuel

  
  

The severity of the damage depends on how much unleaded petrol was added and whether the engine was started after refuelling.

Immediate Steps to Take After Realizing the Mistake

If you notice you have put unleaded petrol in a diesel tank, follow these steps immediately:

1. Do not start the engine

   Starting the engine circulates the wrong fuel through the system, increasing the risk of damage.

   
   

2. Turn off the ignition and remove the key

   This prevents accidental starting.

   
   

3. Call for professional help

   Contact our local wrong fuel drain service in Essex on 0330 122 6640 if you experienced fuel contamination issues.

   
   

4. Inform our team about the fuel mix-up

   LOCATION (postcode or what3words), REGISTRATION NUNMBER, what mistake happened (petrol in a diesel car). This helps us prepare the right tools and procedures.

   
   

5. Avoid trying to drain the tank yourself unless you have the proper equipment and knowledge

   Incorrect handling can cause spills or further damage.

   
   

How Professionals Handle Unleaded in a Diesel Tank

When our arrives at your location in Essex, technicians will typically:

• Drain the contaminated fuel tank completely

This removes all unleaded petrol from the system.

• Flush the fuel lines and filters

Cleaning the fuel system ensures no petrol remains that could harm the engine.

• Refill the tank with the correct diesel fuel

After cleaning, the vehicle is refuelled with diesel.

• Test the engine carefully

The vehicle is started and monitored to ensure it runs smoothly.

Costs and Time Involved in Fixing the Mistake

The cost to fix unleaded fuel in a diesel tank varies depending on:

• The amount of unleaded petrol added

• The make and the model of the vehicle

• Whether the engine was started

• The extent of damage to fuel system components

  
  

Typical costs in Essex range from £150 to over £1,000 if major repairs are needed. The process can take a few hours to a full day depending on the severity.

How to Avoid Putting Unleaded Fuel in a Diesel Tank

Preventing this mistake is easier than fixing it. Here are some tips:

• Always check the fuel pump label before refuelling

Diesel pumps are usually green or black, while unleaded petrol pumps are often green or black but clearly marked.

• Look for the diesel symbol on the fuel cap or near the fuel tank

Many vehicles have a diesel sticker or label.

• If you are unsure, ask the petrol station attendant for help

It’s better to double-check than risk damage.

• Use a fuel card or app that specifies your vehicle’s fuel type

Some apps help avoid confusion by guiding you to the correct pump.

What to Do If You Have Already Driven the Vehicle

If you started the engine and drove after putting unleaded petrol in a diesel tank:

• Stop driving immediately

Continuing to drive can cause more damage.

• Turn off the engine and call for roadside assistance

Do not attempt to drive to a garage.

• Inform our wrong fuel drain service about the fuel issue

This helps us prepare for the necessary repairs.

Common Questions About Fuel Mix-Ups in Essex

Can I add diesel to dilute the petrol?

No, adding diesel will not fix the problem and can make it worse by spreading the petrol through the system.

Is it safe to drive after the fuel system is cleaned?

Yes, once the fuel system is properly drained, flushed, and repaired, the vehicle should be safe to drive.

How long does it take to get my car fixed?

We provide same day service which means in a few hours your car will be back on the road.

Final Thoughts on Handling Unleaded Fuel in a Diesel Tank in Essex

Putting unleaded petrol in a diesel tank is a stressful mistake but acting quickly can save your vehicle from serious damage. Avoid starting the engine, seek professional help immediately, and follow the advice of experienced mechanics in Essex. Taking preventive steps before refuelling can help you avoid this problem altogether.

0330 122 6640