Bad fuel in your Audi A6 Quattro? Diesel in a Petrol Audi?

We can help!
Call us: 0333 366 0103
Audi Fuel Drain


Filling Diesel in a Petrol Audi is a very common problem. And its solution depends upon an assortment of factors. If perhaps you want to find out what to do about it then keep on reading.
Listed here the most important variables to consider when choosing whether or not to have your car drained:

  1. What amount of Diesel did you put in the Audi, keeping in mind that the fuel capacity of your Audi A6 Quattro is in most cases around 80 litres?
    1. A small quantity of Diesel, something like 4 litres of Diesel in a Petrol A6 Quattro will most of the time not really be a massive problem. Experience has proven to us that an amount less than 4 litres (approximately 5% of the fuel tank) is quite often able to be completely diluted by thoroughly topping the tank with the correct fuel.
      It's highly uncommon to come across a car experiencing problems with less than 5% wrong fuel contamination. Bear in mind that it is unusual - certainly not impossible to encounter. You will discover some cars that will not endure any quantity of contamination whatsoever.
    2. Anywhere between 4 and 8 litres of Diesel in the Audi (5 to 10%) is more of a 50/50 condition. Our working experience has confirmed that as many drivers get away with this as those people who don't. Any time you're deciding upon whether to risk it and just simply fill it up consider that it is the same as gambling your car on black - you will have a 50/50 possibility of it being ok.
    3. Anything in excess of 8 litres of Diesel in a Petrol A6 Quattro should really right away be removed since your probability of succeeding with that level of contamination is in all likelihood less than one in 50 - really big odds.
  2. Put Diesel in a Petrol Audi and drove it: Have you noticed any performance difficulties after putting the bad fuel in the A6 Quattro? In that case, have it emptied irrespective of the amount of Diesel or the contamination percentage. Proceeding to drive running a car that is now beginning to suffer from the effects of fuel contamination will probably typically result in even more harm affecting the fuel system components.
  3. Do you want security?
    Then simply just get it drained. Whatever the contamination percentage, there is always some extent of risk resulting from operating a Petrol vehicle on fuel contaminated with Diesel. Possible implications of driving a vehicle on the wrong fuel can include the motor not starting, running lumpy, decrease in power, wearing of the high-pressure pump, damaged or bunged injectors, etc. These are several of the most common Diesel in Petrol symptoms, and if you recognise any of them then stop and get it removed asap.

Steer clear of having any unqualified mechanic to attend your vehicle. We are Audi specialists and hold the qualifications and experience required to ensure you get back on the road with minimal hassle or trouble.

Put Diesel in a Petrol Audi

Unintentionally put Diesel in a Petrol Audi? Or even put contaminated fuel in your Audi A6 Quattro?

Contact us for Assistance & Recommendations

Call us and receive genuine advice and practical assistance for your specific circumstance

We come out and drain it

We are able to reach you to perform the complete fuel retrieval & cleanse there on scene

Once performed You Get Going Once again

Once we have finished you will be able to get back moving and get on with your trip

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain professionals in the UK, having countrywide cover, for Audi motorists particularly. We mainly attend to:

  • Unleaded petrol in 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. Regardless of whether it's at the roadside, on a filling station forecourt, or even at your house, we can get you on the road again.

The Process

The system of draining Diesel from a Petrol vehicle is generally similar for the vast majority of motor vehicles. Needless to say it may differ to some extent as each manufacturer has their own distinct fuel system. However it still essentially follows the following guidelines:

Petrol in Diesel Audi

Fuel Drain

Empty the Fuel Tank

View more
Wrong Fuel Drain Audi

System Flush

Clean out the fuel lines & pumps

View more
Petrol in Diesel Drain Audi

Vehicle Restart

Get the car up and running again

View more


Hours a Day


Days a Week





Our Partners

Just some of the few people we work with to bring you the best petrol in diesel service possible

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

In case you have any concerns or need some assistance please Call us!
We can get you going once again.

24 hour Audi Helpline

0333 366 0103

Our Business Office

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

Weekdays: 9am to 5pm

Important Info

Fully Insured

VAT Registered

APEX Certified


Fully Mobile

Professionally Trained