Contaminated fuel in a Audi TT TDI Quattro? Petrol in your Diesel Audi?

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Audi Fuel Drain


Filling up with Petrol in a Diesel Audi is a very common mistake to make. And what you have to do about it will depend on a number of factors. If you want to know what you must do to fix it then keep reading.
These are the most important factors to consider whenever choosing whether to have a fuel drain:

  1. How much Petrol have you put in the Audi, considering that the fuel capacity of your Audi TT TDI Quattro is in most cases roughly 60 litres?
    1. A small amount of Petrol, something like 3 litres of Petrol in a Diesel TT TDI Quattro will normally not be a big problem. Experience has demonstrated to us that quantities less than 3 litres (which is close to 5% of the whole fuel tank) is generally able to be completely diluted by means of wholly topping the remainder of the tank with the right fuel.
      It is quite rare to find a vehicle going through difficulties due to lower than 5% wrong fuel contamination. Do not forget that it is rare - definitely not impossible to encounter. You can get some vehicles that won't endure any level of fuel contamination whatsoever.
    2. Between 3 and 6 litres of Petrol in the Audi (from 5 to 10%) is really a 50/50 condition. Our experience has shown that as many motorists get away with this as those people who break down. Any time you're figuring out whether or not to chance it and just fill it up consider that it is the same as betting all of it on black - you have a 50/50 possibility of it working out.
    3. Anything above 6 litres of Petrol in a Diesel TT TDI Quattro ought to promptly be drained out as your probability of succeeding with this quantity of contamination is undoubtedly less than one in 50 - definitely huge odds.
  2. Put some Petrol in a Diesel Audi and drove it: Have you noted any performance issues since putting the incorrect fuel in your TT TDI Quattro? If so, have it emptied no matter the quantity of Petrol or even the contamination percentage. Still driving a car that is now starting to suffer from the consequences of wrong fuel contamination will probably likely end up in increasing amounts of harm being caused to the fuel system components.
  3. Are you looking for reassurance?
    Then simply just get it drained. Whatever the contamination ratio, there is inevitably some degree of danger linked with driving a Diesel motor on Diesel contaminated with Petrol. Likely consequences of driving a car on the wrong fuel can include the motor refusing to start, running unevenly, loss in power, degradation of the high-pressure pump, damaged or bunged injectors, etc. These are a few of the most typical Petrol in Diesel symptoms, and in the event that you observe any of them then cease driving and get it removed immediately.

Stay away from having any unqualified so-and-so to attend your vehicle. We are Audi specialists and possess the certification and working experience required to make sure that you are back on the road with minimum hassle or trouble.

Put Petrol in a Diesel Audi

Accidentally put Petrol in a Diesel Audi? Or even put contaminated fuel in your Audi TT TDI Quattro?

Contact us for Assistance & Guidance

Call us and obtain straightforward guidance and practical assistance for your particular situation

We come out and drain it

We are able to come to you to undertake the complete contaminated fuel retrieval & flush right there on scene

All done & You Get Going Once again

Once we are done you are able to get back moving and get on with your trip

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain professionals in the UK, having countrywide cover, for Audi motorists especially. We mostly deal with:

  • Unleaded petrol in Diesel Car
  • Diesel in an Unleaded Petrol Vehicle
  • AdBlue fuel contamination
  • Water contamination

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

The Procedure

The process of removing Petrol from a Diesel vehicle is generally exactly the same for the majority of vehicle makes. Needless to say it can differ to some extent as every brand has their unique distinct fuel system. Even so it still adheres to the below guidelines:

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 FAQs

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.

Get in Touch

In the event that you have any queries or want our help please Contact Us!
We can get you going again.

24/7 Audi Helpline

0333 366 0103

Our Business Office

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

Weekdays: 9am to 5pm

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