Contaminated fuel in your Audi A4 TDI? Petrol in a Diesel Audi?

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Audi Fuel Drain


Filling Petrol in a Diesel Audi is a fairly typical mistake to make. And what you want to do about it hinges on a number of factors. If perhaps you would like to find out what you have to do to sort it out then keep reading.
Listed below are the main variables to consider whenever deciding whether or not to have it drained:

  1. How much Petrol did you put in the Audi, bearing in mind that the fuel capacity of your Audi A4 TDI is probably around 70 litres?
    1. Hardly any Petrol, less than 3.5 litres of Petrol in a Diesel A4 TDI will usually not really be a huge problem. Experience has proven to us that quantities under 3.5 litres (5% of the fuel tank volume) is in many instances capable of being sufficiently diluted through thoroughly filling the tank with the right fuel.
      It is pretty uncommon to find a car or truck suffering from issues with lower than 5% incorrect fuel contamination. Keep in mind that it is rare - certainly not impossible to find. You will discover a few cars that won't endure any degree of contamination whatsoever.
    2. Somewhere between 3.5 and 7 litres of Petrol in the Audi (from 5 to 10%) is more of a 50/50 condition. Our experience demonstrates that as many people get away with it as those who break down. Whenever you are deciding on whether to risk it and just fill it up remember that it is exactly like gambling your car on black - you have a 50/50 possibility of it being ok.
    3. Anything in excess of 7 litres of Petrol in your Diesel A4 TDI really should right away be drained because your likelihood of succeeding with this quantity of contamination is probably below one in 50 - extremely big odds.
  2. Put Petrol in a Diesel Audi and drove it: Have you noticed any performance concerns as a result of putting the bad fuel in the A4 TDI? If you have, get it drained irrespective of the volume of Petrol or the contamination percentage. Continually driving a vehicle that is already starting to suffer the effect of fuel contamination can definitely result in more damage affecting the fuel system components.
  3. Are you interested in assurance?
    Then get it emptied. Whatever the contamination percentage, there is invariably some extent of risk linked with operating a Diesel motor on Diesel contaminated with the wrong fuel. Probable implications of driving on the wrong fuel can include the motor not starting, running lumpy, reduced power, wearing of the high-pressure pump, worn out or bunged injectors, and so forth. These are several of the most frequently seen Petrol in Diesel warning signs, and if you detect any of them then stop driving and get it drained right away.

Avoid getting any jack-of-all-trades to attend your automobile. We are Audi experts and have got the qualifications and expertise necessary to ensure you are back on the road with minimum hassle or trouble.

Put Petrol in a Diesel Audi

Unintentionally put Petrol in a Diesel Audi? Or possibly even put contaminated fuel in your Audi A4 TDI?

Call us for Assistance & Advice

Call us and obtain reliable guidance and sensible help for your particular situation

We arrive and do a fuel drain

We can reach you to perform the contaminated fuel retrieval & purge there on scene

Once completed You Get Moving Again

When we are done you can get back on your way and get on with your trip

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain professionals in the UK, boasting national service, for Audi motorists especially. We primarily attend:

  • Unleaded petrol in Diesel Car
  • Diesel in Unleaded Petrol Auto
  • AdBlue contamination
  • Water contamination

We are Audi specialists and have successfully drained thousands of Diesel Audi vehicles. Regardless of whether it is roadside, on a filling station forecourt, or even at home, we are able to get you going once again.

The Process

The procedure of removing Petrol from a Diesel vehicle is fundamentally the same for virtually all vehicles. As you can imagine it does vary to some degree as every make has their unique distinct fuel system. Having said that it still basically observes the below principles:

Petrol in Diesel Audi

Fuel Drain

Empty the Fuel Tank

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Wrong Fuel Drain Audi

System Flush

Clean out the fuel lines & pumps

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Petrol in Diesel Drain Audi

Vehicle Restart

Get the car up and running again

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Petrol in Diesel Questions

When someone has put Petrol in a Diesel car they have a few very common questions. So we have compiled a list of the most Frequently Asked Questions for you

I put Petrol in a Diesel car and drove it. What do I do?


Turn off the car as soon as possible and call us. Continuing to run a vehicle on the wrong fuel can potentially damage it. We will be able to give you advice and assistance based on your circumstances

Will driving a Diesel car on Petrol cause damage to it?


It can. However, if the problem is caught and remedied quickly the risks will be minimal. Of the 1,500 vehicles we attend every month, less than 0.5% have suffered and substantial damage requiring parts replacement.

How much Petrol can I get away with in a Diesel car?


The safe answer is none. However you might be able to get away with a very low contamination ratio. That being said, we always highly recommend draining anything over a 5% contamination ratio asap.

I know about petrol in diesel, but what about Super Unleaded?


Putting Super Unleaded, or Shell V-Power, BP Ultimate Unleaded, etc, will have the exact same effect as putting regular unleaded petrol in your diesel car and will need to be drained out and flushed.

Will getting you to do a fuel drain void my warranty?


No! The EU Block Exemption Regulations clearly state that "the work can be carried out by as long as that garage uses manufacturer approved parts and correctly follows the manufacturer's service schedule."

Can I top it up with Diesel and add some 2-stroke oil?


This might work on some vehicles in some cases, but in the majority on instances it won't and you risk damaging the Lambda sensors as well as fuel pump and injectors, just as a regular misfuel.

Call us

Should you have any enquiries or require assistance please Contact Us!
We can get you going again.

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0333 366 0103

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Fuel Fixer Ltd, Linx House, 147 London Road, East Grinstead, RH19 1ET

Weekdays: 9am to 5pm

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