Incorrect fuel in your BMW M3 Coupe? Diesel in your Petrol BMW?

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


Putting Diesel in a Petrol BMW is a fairly typical mistake to make. And exactly what you need to do about it is determined by a variety of things. Assuming you would like to know what you need to do to sort it out then keep on reading.
Listed here are the key factors to think about whenever deciding on whether to have the car drained:

  1. What level of Diesel did you put in to the BMW, considering that the fuel tank capacity of the BMW M3 Coupe is probably roughly 65 litres?
    1. A modest amount of Diesel, less than 3.25 litres of Diesel in a Petrol M3 Coupe will normally not necessarily be a huge problem. Experience has taught us that an amount less than 3.25 litres (roughly 5% of the total fuel tank capacity) is generally capable of being sufficiently diluted by wholly filling the rest of the tank with Petrol.
      It's relatively uncommon to come across an automobile going through difficulties because of lower than 5% wrong fuel contamination. Please remember it is unusual - certainly not impossible to find. You can get certain vehicles that don't endure any amount of fuel contamination in the slightest.
    2. Somewhere between 3.25 and 6.5 litres of Diesel in the BMW (5 to 10%) is more of a 50/50 situation. Our expertise has demonstrated that as many motorists get away with this as those who break down. Any time you are deciding whether to risk it and just top it up remember that it is just like wagering your car on black - you've got a 50/50 possibility of it being ok.
    3. Anything over 6.5 litres of Diesel in your Petrol M3 Coupe must right away be removed because your probability of driving with that amount of contamination is more than likely below one in 50 - truly big odds.
  2. Put some Diesel in a Petrol BMW and drove it: Have you noted any performance troubles as a result of putting the wrong fuel in the M3 Coupe? In that case, have it removed no matter the amount of Diesel or even the contamination ratio. Continuing to drive running a vehicle that is now beginning to suffer from the effect of wrong fuel contamination will probably typically cause more and more harm being caused to the fuel system.
  3. Are you interested in assurance?
    Then get it removed. Regardless of contamination ratio, there is invariably a certain level of threat linked with running a Petrol vehicle on fuel contaminated with the incorrect fuel. Likely consequences of driving a car on the incorrect fuel can include the motor refusing to start, running unevenly, decrease in power, degradation of the high-pressure pump, worn or blocked injectors, and the like. These are a few of the most frequently seen Diesel in Petrol signs and symptoms, and should you observe any of them then stop driving and get it drained right away.

Keep away from having any untrained so-and-so to attend your car. We are BMW specialists and have got the qualifications and experience necessary to make sure that you are back on the road with a minimum of hassle or trouble.

Put Diesel in a Petrol BMW

Unintentionally put Diesel in a Petrol BMW? Or perhaps even put contaminated fuel in your BMW M3 Coupe?

Give us a call for Assistance & Guidance

Give us a call and receive honest recommendations and practical assistance for your exact situation

We arrive and do a fuel drain

We would come to you to do the contaminated fuel drain & purge there on scene

All done & You Get Moving Again

Once we have finished you will be able to get back on your way and get on with your trip

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain experts in the UK, having national cover, for BMW motorists particularly. We mainly deal with:

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

We are BMW specialists and have successfully drained thousands of Petrol BMW vehicles. No matter if it is at the roadside, on a filling station forecourt, or even at your house, we are able to get you going once again.

The Process

The method of extracting Diesel from a Petrol car is basically the same for most cars. Naturally it may differ a little as each make has their own distinct fuel system. Even so it still fundamentally follows the following points:

Petrol in Diesel BMW

Fuel Drain

Empty the Fuel Tank

View more
Wrong Fuel Drain BMW

System Flush

Clean out the fuel lines & pumps

View more
Petrol in Diesel Drain BMW

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.

Call us

In case you have any questions or need our assistance please Call us!
We can get you going once again.

24 hour BMW 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