Wrong fuel in a Citroen C4? Diesel in a Petrol Citroen?

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


Filling Diesel in a Petrol Citroen is a regularly occurring problem. And what you should do about it depends upon various factors. If you want to know what you must do to sort it out then stay with me.
Listed below are the main factors to be aware of whenever figuring out whether to get your car drained:

  1. Exactly how much Diesel have you put in to the Citroen, considering that the fuel tank capacity of your Citroen C4 is most likely about 60 litres?
    1. A modest quantity of Diesel, something like 3 litres of Diesel in a Petrol C4 will in most situations not be a major problem. Experience has shown us that quantities less than 3 litres (which is close to 5% of the overall fuel tank) is generally able to be adequately diluted by thoroughly filling up the rest of the tank with Petrol.
      It's very unusual to come across a motor vehicle having issues due to below 5% wrong fuel contamination. Bear in mind that it is very uncommon - definitely not impossible to find. There are actually a number of cars that won't endure any degree of contamination in the slightest.
    2. Somewhere between 3 and 6 litres of Diesel in the Citroen (from 5 to 10%) is really a 50/50 situation. Our expertise has shown us that as many people get away with this as all those who don't. Any time you're deciding whether or not to chance it and basically fill it up recognise that it is the same thing as wagering your car on black - you will have a 50/50 chance of it being ok.
    3. Anything in excess of 6 litres of Diesel in your Petrol C4 ought to straightaway be drained seeing that your likelihood of driving with this level of contamination is certainly less than one in fifty - seriously huge odds.
  2. Put Diesel in a Petrol Citroen and drove it: Have you noted any kind of performance problems since putting the wrong fuel in your C4? In that case, get it removed regardless of the quantity of Diesel or the contamination ratio. Continually running a vehicle that is currently beginning to suffer the effects of fuel contamination can only bring about increasing amounts of damage affecting the fuel system parts.
  3. Are you interested in peace of mind?
    Then simply just get it emptied. Whatever the contamination ratio, there is always some extent of danger connected to operating a Petrol motor on Petrol contaminated with Diesel. Likely outcomes of driving a vehicle on the incorrect fuel normally include the motor not starting, running lumpy, loss of power, degradation of the high-pressure pump, damaged or clogged injectors, etc. These are several of the most typical Diesel in Petrol signs or symptoms, and should you recognise any of them stop and get it removed immediately.

Don't just have any untrained so-and-so to attend your vehicle. We are Citroen experts and have got the credentials and expertise necessary to ensure you are back on the road with no hassle or worry.

Put Diesel in a Petrol Citroen

Mistakenly put Diesel in a Petrol Citroen? Or perhaps even put contaminated fuel in your Citroen C4?

Contact us for Help & Advice

Give us a call and receive sincere guidance and sensible help for your precise situation

We arrive and do a fuel drain

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

All done & You Get Moving Again

When we have completed you should be able to get back on your way and get on with your trip

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain specialists in the UK, offering nationwide coverage, for Citroen motorists particularly. We mostly attend to:

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

We are Citroen specialists and have successfully drained thousands of Petrol Citroen vehicles. Whether or not it is roadside, on a petrol station forecourt, or even at your house, we are able to get you going once again.

The Process

The technique of removing Diesel from a Petrol car is basically identical for most vehicles. Of course it does vary to some degree as every manufacturer has their own different fuel system. Nevertheless it still essentially follows the following points:

Petrol in Diesel Citroen

Fuel Drain

Empty the Fuel Tank

View more
Wrong Fuel Drain Citroen

System Flush

Clean out the fuel lines & pumps

View more
Petrol in Diesel Drain Citroen

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 the event that you have any concerns or need our assistance please Call us!
We can get you on the road once again.

24/7 Citroen Helpline

0333 366 0103

Our Corporate Office

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


Important Info

Fully Insured

VAT Registered

APEX Certified


Fully Mobile

Professionally Trained