Bad fuel in your Volvo 940 TDI? Petrol in a Diesel Volvo?

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


Filling Petrol in a Diesel Volvo is a common mistake to make. And exactly what you have to do about it is dependent upon several things. Assuming you want to find out what you need to do to sort it out then keep on reading.
Let us discuss the key factors to to consider when deciding whether or not to have a fuel drain:

  1. Exactly how much Petrol have you put in to the Volvo, keeping in mind that the fuel capacity of your Volvo 940 TDI is usually approximately 60 litres?
    1. A tiny amount of Petrol, as little as 3 litres of Petrol in a Diesel 940 TDI will generally not really be a massive problem. Experience has shown us that anything under 3 litres (which is approximately 5% of the entire fuel tank) is in many instances capable of being sufficiently diluted by totally filling up the rest of the tank with Diesel.
      It's extremely unusual to come across a car suffering from issues due to under 5% wrong fuel contamination. Do not forget that it's infrequent - not impossible to find. There are actually certain cars that don't stand any degree of contamination whatsoever.
    2. Somewhere between 3 and 6 litres of Petrol in the Volvo (from 5 to 10%) is a 50/50 scenario. Our experience has confirmed that as many drivers get away with it as those who don't. When you are figuring out whether or not to chance it and simply top it up bear in mind that it is much like gambling it all on black - you've got a 50/50 chance of it working out.
    3. Anything in excess of 6 litres of Petrol in a Diesel 940 TDI should right away be removed seeing that your probability of driving with that quantity of contamination is probably less than one in 50 - seriously long odds.
  2. Put Petrol in a Diesel Volvo and drove it: Have you detected any kind of performance troubles after putting the wrong fuel in the 940 TDI? If you have, have it removed no matter the volume of Petrol or even the contamination ratio. Still driving a motor vehicle that is currently beginning to suffer the effect of fuel contamination will probably likely cause more damage being caused to your fuel system components.
  3. Do you want assurance?
    Then simply just get it drained. Regardless of the contamination percentage, there is invariably some extent of risk connected to running a Diesel motor on Diesel contaminated with Petrol. Possible final outcomes of driving on the incorrect fuel include things like the motor not starting, running unevenly, decrease in power, wearing of the high-pressure pump, worn out or bunged injectors, etc. These are several of the most common Petrol in Diesel signs and symptoms, and in the event that you recognise any of them stop and get it drained right away.

Don't just have any unqualified mechanic to try to fix your automobile. We are Volvo specialists and have the certification and knowledge needed to make sure that you are back on the road with no hassle or worry.

Put Petrol in a Diesel Volvo

Mistakenly put Petrol in a Diesel Volvo? Or possibly even put contaminated fuel in your Volvo 940 TDI?

Call us for Help & Recommendations

Call us and obtain straightforward guidance and practical help for your precise circumstance

We come out and do a fuel drain

We are able to come to you to do the fuel removal & purge there on scene

Once completed You Get Moving Again

When we are done you will be able to get back on the road and get on with your day

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain authorities in the UK, boasting nationwide service, for Volvo motorists especially. We mostly deal with:

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

We are Volvo specialists and have successfully drained hundreds of Diesel Volvo vehicles. Whether or not it is at the roadside, on a station forecourt, or even at your house, we can get you going again.

The Process

The process of draining Petrol from a Diesel vehicle is generally exactly the same for most cars. As you can imagine it may differ somewhat as each brand has their own distinct fuel system. However it still fundamentally observes the following points:

Petrol in Diesel Volvo

Fuel Drain

Empty the Fuel Tank

View more
Wrong Fuel Drain Volvo

System Flush

Clean out the fuel lines & pumps

View more
Petrol in Diesel Drain Volvo

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 Questions

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.

Call us

If you have any enquiries or require some assistance please Call us!
We can get you going again.

24/7 Volvo 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