Incorrect fuel in your Fiat Ulysse? Diesel in a Petrol Fiat?

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


Filling up with Diesel in a Petrol Fiat is a regular error. And what you want to do about it is based on a variety of factors. In case you would like to know what it is best to do to sort it out then keep on reading.
Let us discuss the main variables to think about whenever deciding on whether or not to get a fuel drain:

  1. How much Diesel have you put in to the Fiat, bearing in mind that the fuel tank capacity of your Fiat Ulysse is most likely about 80 litres?
    1. A modest amount of Diesel, something like 4 litres of Diesel in a Petrol Ulysse will usually not really be a big problem. Experience has shown us that anything less than 4 litres (which is about 5% of the entire fuel tank capacity) is oftentimes capable of being sufficiently diluted through entirely topping the remainder of the tank with Petrol.
      It is extremely unusual to come across a motor vehicle experiencing problems due to less than 5% wrong fuel contamination. Remember that it is very uncommon - not impossible to find. You can get certain motor vehicles that will not endure any level of fuel contamination whatsoever.
    2. Somewhere between 4 and 8 litres of Diesel in the Fiat (5 to 10%) is more of a 50/50 condition. Our experience has confirmed that as many motorists get away with this as all those who don't. Whenever you are trying to decide whether to risk it and just top it up recognise that it is very much like betting everything on black - you will have a 50/50 possibility of it working out.
    3. Anything above 8 litres of Diesel in your Petrol Ulysse must straightaway be drained since your likelihood of driving with this amount of contamination is in all likelihood lower than one in fifty - really big odds.
  2. Put some Diesel in a Petrol Fiat and drove it: Have you observed any kind of performance difficulties as a result of putting the bad fuel in your Ulysse? In that case, have it emptied irrespective of the volume of Diesel or even the contamination ratio. Still driving an automobile that is beginning to suffer the consequences of fuel contamination will probably likely cause increasing amounts of harm affecting your fuel system components.
  3. Do you need peace of mind?
    Simply get it removed. No matter the contamination percentage, there is invariably a certain level of risk connected with driving a Petrol motor on Petrol contaminated with Diesel. Possible final outcomes of driving a vehicle on the incorrect fuel normally include the motor not starting, running unevenly, loss in power, degradation of the high-pressure pump, worn or blocked injectors, and so on. These are a few of the most typical Diesel in Petrol signs or symptoms, and if you recognise any of them cease driving and have it drained right away.

Don't simply get any untrained so-and-so to try to drain your vehicle. We are Fiat experts and possess the credentials and knowledge required to ensure that you get back on the road with no hassle or worry.

Put Diesel in a Petrol Fiat

Accidentally put Diesel in a Petrol Fiat? Or even put contaminated fuel in your Fiat Ulysse?

Give us a call for Help & Guidance

Contact us and obtain sincere advice and sensible assistance for your precise circumstances

We arrive and do a fuel drain

We would come to you to carry out the contaminated fuel retrieval & clean right there on scene

Once completed You Get Moving Again

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

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain authorities in the UK, having countrywide service, for Fiat motorists in particular. We typically fix:

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

We are Fiat specialists and have successfully drained thousands of Petrol Fiat vehicles. Even if it is roadside, on a station forecourt, or even at your house, we can get you moving once again.

The Process

The procedure of draining Diesel from a Petrol vehicle is in essence exactly the same for most motor vehicles. Of course it can differ to some extent as every brand has their own fuel system. Even so it still basically adheres to the below principles:

Petrol in Diesel Fiat

Fuel Drain

Empty the Fuel Tank

View more
Wrong Fuel Drain Fiat

System Flush

Clean out the fuel lines & pumps

View more
Petrol in Diesel Drain Fiat

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.

Get in Touch

In the event that you have any enquiries or require help please Contact Us!
We can get you going again.

24 hour Fiat 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