Wrong fuel in a BMW M3? Diesel in a Petrol BMW?

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BMW Fuel Drain


Filling up with Diesel in a Petrol BMW is a regular mistake to make. And what you need to do about it depends upon a few factors. Assuming you would like to find out what it is best to do about it then read on.
Here are the main factors to keep in mind when deciding on whether or not to get your car drained:

  1. Exactly how much Diesel did you put in to the BMW, taking into consideration that the fuel tank capacity of the BMW M3 is in most cases approximately 65 litres?
    1. A small amount of Diesel, less than 3.25 litres of Diesel in a Petrol M3 will normally not be a significant problem. Experience has shown us that anything under 3.25 litres (roughly 5% of the overall fuel tank) is sometimes capable of being adequately diluted by means of thoroughly filling the tank with Petrol.
      It is pretty rare to come across a car or truck experiencing issues with lower than 5% incorrect fuel contamination. Please remember it is very rare - certainly not impossible to find. There are certain motor vehicles that won't endure any degree of contamination in the slightest.
    2. Between 3.25 and 6.5 litres of Diesel in the BMW (5 to 10%) is really a 50/50 condition. Our working experience has confirmed that as many motorists get away with this as those who don't. When deciding whether to risk it and just simply fill it up consider that it is the same thing as gambling all of it on black - you have a 50/50 chance of it working out.
    3. Anything more than 6.5 litres of Diesel in a Petrol M3 must as soon as possible be drained seeing as your likelihood of succeeding with this level of contamination is very likely less than one in 50 - seriously long odds.
  2. Put some Diesel in a Petrol BMW and drove it: Have you detected any kind of performance concerns as a result of putting the incorrect fuel in the M3? If that's the case, have it removed regardless of the volume of Diesel or the contamination ratio. Continually driving a car that is now starting to suffer from the consequences of fuel contamination can only lead to even more harm being caused to the fuel system components.
  3. Are you looking for reassurance?
    You should get it drained. Whatever the contamination ratio, there is invariably some extent of risk linked with operating a Petrol engine on fuel contaminated with the incorrect fuel. Likely results of driving a vehicle on the incorrect fuel include things like the motor not starting, running unevenly, losing power, wearing 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 observe any of them then stop and have it removed asap.

Do not simply get any jack-of-all-trades to try to repair your vehicle. We are BMW specialists and hold the skills and working experience required to make certain that you get back on the road with minimum hassle or trouble.

Put Diesel in a Petrol BMW

Mistakenly put Diesel in a Petrol BMW? Or even put contaminated fuel in your BMW M3?

Call us for Assistance & Guidance

Give us a call and obtain straightforward recommendations and sensible help for your precise situation

We show up and drain it

We are able to go to you to do the contaminated fuel drain & clean there on scene

All done & You Get Moving Once again

When we have finished you are 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, offering nationwide coverage, for BMW motorists in particular. We typically attend to:

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

We are BMW specialists and have successfully drained thousands of Petrol BMW vehicles. Regardless of whether it is roadside, on a filling station forecourt, or even at your home, we can get you on the road once again.

The Process

The system of extracting Diesel from a Petrol car is basically exactly the same for the majority of motor vehicles. Naturally it may vary a bit as every brand has their own different fuel system. Even so it still fundamentally adheres to the following principles:

Petrol in Diesel BMW

Fuel Drain

Empty the Fuel Tank

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Wrong Fuel Drain BMW

System Flush

Clean out the fuel lines & pumps

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Petrol in Diesel Drain BMW

Vehicle Restart

Get the car up and running again

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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

In case you have any enquiries or need some help please Call us!
We can get you moving once again.

24/7 BMW Helpline

0333 366 0103

Our Corporate Office

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


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