Bad fuel in a Ford Focus? Diesel in a Petrol Ford?

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


Putting Diesel in a Petrol Ford is a common problem. And exactly what you have to do about it depends upon a number of things. In the event that you would like to know what you need to do about this then continue reading.
Listed here are the most crucial variables to keep in mind when figuring out whether or not to get your car drained:

  1. How much Diesel have you put into the Ford, bearing in mind that the fuel capacity of the Ford Focus is in most cases roughly 55 litres?
    1. A tiny amount of Diesel, as little as 2.75 litres of Diesel in a Petrol Focus will in most cases not necessarily be a significant problem. Experience has taught us that an amount less than 2.75 litres (almost 5% of the fuel tank) is frequently capable of being completely diluted simply by totally topping up the remainder of the tank with the correct fuel.
      It is relatively unusual to find a vehicle experiencing problems due to less than 5% wrong fuel contamination. Bear in mind that it is infrequent - not impossible to find. You can get a number of automobiles that don't stand any level of contamination at all.
    2. Anywhere between 2.75 and 5.5 litres of Diesel in the Ford (5 to 10%) is a 50/50 scenario. Our experience has demonstrated that as many people get away with this as all those who don't. Whenever you are deciding upon whether or not to chance it and basically fill it up bear in mind that it is very much like wagering everything on black - you've got a 50/50 possibility of it working.
    3. Anything above 5.5 litres of Diesel in your Petrol Focus really should straight away be drained out as your likelihood of getting away with this level of contamination is probably less than one in 50 - seriously long odds.
  2. Put Diesel in a Petrol Ford and drove it: Have you detected any performance troubles after putting the bad fuel in your Focus? In that case, have it emptied irrespective of the amount of Diesel or even the contamination ratio. Proceeding to run driving an automobile that is beginning to suffer the consequences of fuel contamination will probably just be responsible for more damage being done to your fuel system.
  3. Would you like assurance?
    Then simply just get it emptied. Regardless of the contamination percentage, there is always some extent of threat affiliated with operating a Petrol engine on fuel contaminated with Diesel. Possible outcomes of driving on the wrong fuel include things like the engine refusing to start, running lumpy, losing power, degradation of the high-pressure pump, damaged or clogged injectors, and so on. These are some of the most common Diesel in Petrol signs and symptoms, and should you recognise any of them stop and have it drained right away.

Do not just have any untrained so-and-so to attend your car. We are Ford specialists and possess the qualifications and expertise required to ensure that you are back on the road with a minimum of hassle or trouble.

Put Diesel in a Petrol Ford

Unintentionally put Diesel in a Petrol Ford? Or possibly even put contaminated fuel in your Ford Focus?

Give us a call for Help & Guidance

Contact us and receive straightforward recommendations and sensible help for your specific circumstances

We come out and drain it

We can go to you to carry out the complete contaminated fuel drain & clean right there on scene

All done & You Get Moving Again

As soon as we have completed you will be able to get back on the road and get on with your trip

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain experts in the UK, boasting countrywide cover, for Ford motorists in particular. We predominantly deal with:

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

We are Ford specialists and have successfully drained thousands of Petrol Ford vehicles. Even if it's roadside, on a petrol station forecourt, or even at your home, we are able to get you on the road again.

The Process

The process of extracting Diesel from a Petrol car is in essence exactly the same for the majority of motor vehicles. Needless to say it can differ to some degree as each brand has their own different fuel system. However it still fundamentally observes the following points:

Petrol in Diesel Ford

Fuel Drain

Empty the Fuel Tank

View more
Wrong Fuel Drain Ford

System Flush

Clean out the fuel lines & pumps

View more
Petrol in Diesel Drain Ford

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 Questions

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.

Call us

Should you have any enquiries or require our help please Contact Us!
We can get you on the road once again.

24 hour Ford 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