What to Do If You Accidentally Put the Wrong Fuel in Your Car

Putting the wrong fuel in your car is a common mistake that can cause serious damage if not handled quickly and correctly. Whether you accidentally filled a petrol car with diesel or a diesel car with petrol, knowing the right steps to take can save you from costly repairs and a lot of stress. This guide explains what to do if you misfuel your car, how to minimize damage, and when to call for professional help like Misfuelled Car Fix at 0800 999 1182.

Car fuel filler neck with petrol nozzle

How to Recognize You’ve Put the Wrong Fuel in Your Car

The first step is to identify the problem as soon as possible. Signs that you may have put the wrong fuel in your car include:

• Engine won’t start or struggles to start after refueling.

• Unusual noises such as knocking or sputtering when the engine runs.

• Warning lights on the dashboard, especially the check engine light.

• Loss of power or poor acceleration.

• Smoke coming from the exhaust.

  
  

If you notice any of these symptoms right after filling up, stop driving immediately to avoid further damage.

What to Do Immediately After Misfuelling

If you realize you’ve put the wrong fuel in your car before starting the engine, do not turn the ignition on. Starting the engine circulates the wrong fuel through the system, increasing the risk of damage.

Here’s what you should do:

• Do not start the car. Keep the engine off.

• Inform the fuel station staff. They may have procedures or assistance for such situations.

• Call a professional service like Misfuelled Car Fix at 0800 999 1182. They can arrange for safe fuel removal and advise on next steps.

  
  

If you have already started the engine, turn it off as soon as you notice something is wrong and call for help immediately.

Why Putting the Wrong Fuel Can Damage Your Car

Different fuels have different properties and engines are designed to run on specific types. Here’s what happens when you put the wrong fuel in your car:

• Diesel in a petrol car: Diesel is thicker and doesn’t evaporate like petrol. It can clog fuel injectors and cause the engine to stall or fail to start.

• Petrol in a diesel car: Petrol acts like a solvent and can damage the diesel fuel pump and injectors, leading to costly repairs.

• Ethanol or biofuels in non-compatible engines: These can cause corrosion or damage seals and hoses.

  
  

The severity of damage depends on how much wrong fuel was added and whether the engine was started.

Steps to Fix a Misfuelled Car

Once you have identified the problem and stopped the engine, the next steps involve removing the wrong fuel and cleaning the system. Here’s what professionals typically do:

1. Drain the fuel tank: The contaminated fuel must be completely drained.

2. Flush the fuel system: This removes any remaining traces of the wrong fuel.

3. Refill with the correct fuel: After cleaning, the tank is refilled with the right fuel.

4. Check the engine and components: Mechanics inspect for any damage and test the engine.

   
   

Attempting to fix this yourself without proper tools can cause more harm. Calling a specialist like Misfuelled Car Fix at 0800 999 1182 ensures the job is done safely and correctly.

How to Prevent Putting the Wrong Fuel in Your Car

Prevention is better than cure. Here are some practical tips to avoid misfuelling:

• Always check the fuel type before filling up. Look at the label on the fuel pump and your car’s fuel cap.

• Use a reminder sticker near the fuel cap. This can help you remember the correct fuel type.

• Avoid distractions at the pump. Focus on the task to prevent mistakes.

• If you drive multiple vehicles, keep the keys separate. This reduces confusion.

• Ask for help if unsure. Fuel station attendants can assist if you’re uncertain.

  
  

What to Expect When Calling a Misfuelled Car Fix Service

When you call a service like Misfuelled Car Fix at 0800 999 1182, expect the following:

• Quick response: They understand the urgency and will prioritize your call.

• Professional assessment: They will ask questions about the fuel type, amount, and whether the engine was started.

• Safe fuel removal: Technicians will drain and clean the fuel system on-site or tow your car to a workshop.

• Clear advice: You will receive guidance on repairs and costs.

• Warranty and guarantees: Reputable services often provide guarantees for their work.

  
  

Using a specialist reduces the risk of long-term damage and ensures your car is safe to drive again.

How Much Does It Cost to Fix a Misfuelled Car?

The cost depends on several factors:

• Amount of wrong fuel added: More fuel means more extensive cleaning.

• Whether the engine was started: Starting the engine increases damage and repair costs.

• Type of vehicle: Some cars have more complex fuel systems.

• Location and service provider: Prices vary by region and company.

  
  

On average, fixing a misfuelled car can cost between £150 and £1000. Early action reduces costs significantly.

When to Contact Your Insurance Company

Some insurance policies cover misfuelling incidents. Check your policy details and consider:

• Reporting the incident promptly. This helps with claims.

• Providing documentation. Keep receipts and service reports.

• Understanding your excess. Sometimes repair costs may be below your excess, making claims unnecessary.

  
  

If unsure, call your insurer for advice.

Final Thoughts on Handling Wrong Fuel in Your Car