Bad fuel in your BMW M3 Cabrio? Diesel in your Petrol BMW?

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BMW Fuel Drain


Filling up with Diesel in a Petrol BMW is a regularly occurring problem. And its solution will depend on several factors. If you want to find out what you should do to fix it then please read on.
These are the key variables to take into account whenever choosing whether to get a fuel drain:

  1. What amount of Diesel did you put in to the BMW, taking into consideration that the fuel capacity of the BMW M3 Cabrio is normally around 65 litres?
    1. Hardly any Diesel, as little as 3.25 litres of Diesel in a Petrol M3 Cabrio will in most situations not necessarily be a major problem. Experience has demonstrated to us that quantities less than 3.25 litres (which is close to 5% of the fuel tank volume) is often able to be adequately diluted simply by wholly topping up the remainder of the tank with Petrol.
      It is extremely unusual to encounter a vehicle experiencing difficulties due to less than 5% wrong fuel contamination. Be aware that it's unusual - definitely not impossible to find. There are actually a few vehicles that will not stand any degree of fuel contamination at all.
    2. Anywhere between 3.25 and 6.5 litres of Diesel in the BMW (from 5 to 10%) is more of a 50/50 scenario. Our working experience has shown that as many drivers get away with it as those people who break down. Whenever you are deciding on whether or not to risk it and just simply fill it up bear in mind that it is the same thing as wagering your car on black - you've got a 50/50 chance of it being ok.
    3. Anything in excess of 6.5 litres of Diesel in your Petrol M3 Cabrio should really as soon as possible be drained since your probability of getting away with that quantity of contamination is undoubtedly below one in 50 - truly huge odds.
  2. Put some Diesel in a Petrol BMW and drove it: Have you detected any performance problems ever since putting the wrong fuel in your M3 Cabrio? If so, get it drained no matter the quantity of Diesel or even the contamination ratio. Continually driving a car that is already starting to suffer from the effects of wrong fuel contamination will typically cause even more harm being caused to your fuel system components.
  3. Do you want security?
    You should get it emptied. No matter the contamination ratio, there is inevitably a certain level of threat in connection with operating a Petrol motor on fuel contaminated with Diesel. Probable outcomes of driving on the wrong fuel can include the engine not starting, running lumpy, loss of power, wearing of the high-pressure pump, damaged or clogged injectors, and the like. These are a few of the most frequently seen Diesel in Petrol signs and symptoms, and in the event that you detect any of them then stop driving and have it drained right away.

Do not just have any unqualified mechanic to try to drain your car. We are BMW specialists and possess the qualifications and working experience necessary to make certain that you are back on the road with minimum hassle or worry.

Put Diesel in a Petrol BMW

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

Contact us for Help & Advice

Call us and receive honest recommendations and practical assistance for your precise situation

We show up and drain it

We would reach you to undertake the complete fuel retrieval & cleanse there on scene

Once performed You Get Going Once again

As soon as we are done you should be able to get back on the road and get on with your trip

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain authorities in the UK, boasting national coverage, for BMW motorists especially. We mainly attend to:

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

We are BMW specialists and have successfully drained thousands of Petrol BMW vehicles. Whether or not it is roadside, on a station forecourt, or even at your home, we can get you moving once again.

The Procedure

The process of getting rid of Diesel from a Petrol car is generally the same for most vehicles. Needless to say it can differ a bit as every brand has their particular fuel system. Even so it still essentially follows the following guidelines:

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.

Contact Us

Should you have any concerns or need our help please Call us!
We can get you moving again.

24/7 BMW Helpline

0333 366 0103

Our Business Office

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

Weekdays: 9am to 5pm

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