Contaminated fuel in your Audi A6 TDI? Petrol in a Diesel Audi?

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


Putting Petrol in a Diesel Audi is a very common mistake. And exactly what you need to do about it hinges on a few things. Assuming you want to find out what you ought to do about it then stay with me.
Let us discuss the most important factors to consider whenever choosing whether to have it drained:

  1. What level of Petrol have you put in to the Audi, keeping in mind that the fuel tank capacity of the Audi A6 TDI is in most cases about 80 litres?
    1. A small quantity of Petrol, less than 4 litres of Petrol in a Diesel A6 TDI will quite often not really be a significant problem. Experience has taught us that quantities less than 4 litres (which is 5% of the overall fuel tank) is oftentimes able to be completely diluted through entirely filling the rest of the tank with Diesel.
      It is rather uncommon to come across a car or truck going through problems due to less than 5% wrong fuel contamination. Keep in mind that it is very infrequent - in no way impossible to find. You will discover a few vehicles that won't endure any level of fuel contamination at all.
    2. In between 4 and 8 litres of Petrol in the Audi (from 5 to 10%) is a 50/50 situation. Our practical experience has confirmed that as many people get away with this as those who don't. When you are trying to decide whether or not to risk it and basically fill it up recognise that it is the same as gambling everything on black - you've got a 50/50 possibility of it working out.
    3. Anything in excess of 8 litres of Petrol in your Diesel A6 TDI ought to immediately be drained out as your probability of driving with this amount of contamination is more than likely lower than one in fifty - extremely big odds.
  2. Put Petrol in a Diesel Audi and drove it: Have you noticed any kind of performance problems ever since putting the bad fuel in your A6 TDI? If so, get it removed no matter the volume of Petrol or even the contamination ratio. Still driving an automobile that is starting to suffer the effect of fuel contamination can just end up in increasing amounts of harm being done to the fuel system.
  3. Would you like peace of mind?
    You should get it removed. Regardless of the contamination ratio, there is inevitably some degree of danger affiliated with driving a Diesel engine on Diesel contaminated with the wrong fuel. Possible implications of driving on the incorrect fuel can include the engine refusing to start, running unevenly, loss of power, degradation of the high-pressure pump, worn or bunged injectors, etc. These are some of the commonest Petrol in Diesel signs or symptoms, and should you notice any of them stop driving and have it drained right away.

Keep away from getting any unqualified mechanic to try to fix your vehicle. We are Audi specialists and hold the accreditation and expertise required to make certain you get back on the road with little hassle or trouble.

Put Petrol in a Diesel Audi

Accidentally put Petrol in a Diesel Audi? Or possibly even put contaminated fuel in your Audi A6 TDI?

Contact us for Assistance & Recommendations

Call us and receive reliable advice and sensible assistance for your specific circumstance

We arrive and do a fuel drain

We can go to you to do the fuel drain & purge there on scene

Once carried out You Get Going Once again

As soon as we have completed you will be able to get back moving and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain specialists in the UK, boasting national service, for Audi motorists especially. We predominantly deal with:

  • Unleaded petrol in Diesel Auto
  • Diesel in an Unleaded Petrol Vehicle
  • AdBlue contamination
  • Water contamination

We are Audi specialists and have successfully drained thousands of Diesel Audi vehicles. No matter if it is at the roadside, on a petrol station forecourt, or even at your home, we are able to get you on the road once again.

The Procedure

The procedure of removing Petrol from a Diesel vehicle is generally similar for the majority of cars. Needless to say it does vary somewhat as every brand has their particular distinct fuel system. Even so it still generally observes the below points:

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

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.

Contact Us

In case you have any enquiries or want help please Contact Us!
We can get you moving 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