Wrong fuel in your Audi S3? Diesel in a Petrol Audi?

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Audi Fuel Drain


Filling up with Diesel in a Petrol Audi is a common error. And what you need to do about it depends upon a few things. In case you would like to know what you need to do to sort it out then please read on.
These are the most crucial factors to take into account when figuring out whether or not to get a fuel drain:

  1. How much Diesel did you put in the Audi, considering that the fuel tank capacity of your Audi S3 is probably roughly 62 litres?
    1. A modest quantity of Diesel, less than 3.1 litres of Diesel in a Petrol S3 will normally not be a major problem. Experience has shown us that anything under 3.1 litres (approximately 5% of the overall fuel tank volume) is often capable of being adequately diluted by means of wholly filling the rest of the tank with the correct fuel.
      It's very rare to find a vehicle having difficulties due to less than 5% wrong fuel contamination. Be aware that it is rare - definitely not impossible to find. You will discover certain automobiles that don't endure any level of fuel contamination at all.
    2. Between 3.1 and 6.2 litres of Diesel in the Audi (from 5 to 10%) is more of a 50/50 scenario. Our practical experience has proven that as many motorists get away with this as all those who don't. When deciding upon whether to chance it and simply fill it up remember that it is exactly like wagering everything on black - you've got a 50/50 possibility of it working.
    3. Anything more than 6.2 litres of Diesel in your Petrol S3 ought to straight away be drained out seeing as your probability of getting away with that level of contamination is probably less than one in 50 - genuinely big odds.
  2. Put some Diesel in a Petrol Audi and drove it: Have you noticed any performance issues since putting the incorrect fuel in the S3? If that's the case, have it removed regardless of the quantity of Diesel or the contamination percentage. Continuing to run driving a car that is starting to suffer the effect of wrong fuel contamination can likely result in even more damage being caused to your fuel system.
  3. Are you looking for assurance?
    In that case get it removed. Regardless of the contamination ratio, there is always some amount of danger resulting from running a Petrol motor on fuel contaminated with the wrong fuel. Likely implications of driving on the incorrect fuel include the motor not starting, running unevenly, reduced power, degradation of the high-pressure pump, worn or blocked injectors, and so on. These are a few of the commonest Diesel in Petrol signs or symptoms, and if you detect any of them cease driving and get it removed right away.

Keep away from getting any unqualified mechanic to try to repair your vehicle. We are Audi experts and hold the qualifications and practical experience required to make certain that you get back on the road with a minimum of hassle or trouble.

Put Diesel in a Petrol Audi

Unintentionally put Diesel in a Petrol Audi? Or possibly even put contaminated fuel in your Audi S3?

Give us a call for Assistance & Recommendations

Call us and receive sincere recommendations and practical assistance for your exact circumstance

We show up and do a fuel drain

We can reach you to do the complete contaminated fuel retrieval & cleanse right there on scene

All done & You Get Going Again

Once we have completed you will be able to get back on the road and get on with your day

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain professionals in the UK, having countrywide coverage, for Audi motorists in particular. We primarily attend to:

  • Unleaded petrol in a Diesel Auto
  • Diesel in your Unleaded Petrol Vehicle
  • AdBlue fuel contamination
  • Water contamination

We are Audi specialists and have successfully drained thousands of Petrol Audi vehicles. Even if it's at the roadside, on a filling station forecourt, or even at your home, we are able to get you going once again.

The Procedure

The method of getting rid of Diesel from a Petrol car is essentially exactly the same for most cars. Of course it can vary a little as each make has their own fuel system. Even so it still basically adheres to the following 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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Diesel in Petrol FAQs

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

I put Diesel in a Petrol 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 Petrol car on Diesel 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 Diesel can I get away with in a Petrol 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 Petrol 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.

Contact Us

Should you have any questions or want assistance please Call us!
We can get you on the road once again.

24 hour Audi Helpline

0333 366 0103

Our Corporate Office

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


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