Incorrect fuel in a BMW 750d xDrive? Petrol in a Diesel BMW?

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


Filling up with Petrol in a Diesel BMW is a common mistake. And exactly what you want to do about it hinges on a few factors. Assuming you would like to know what it is advisable to do about it then stay with me.
Let us discuss the main factors to be aware of when deciding whether to have your car drained:

  1. Exactly how much Petrol did you put into the BMW, taking into consideration that the fuel capacity of the BMW 750d xDrive is normally about 80 litres?
    1. A modest amount of Petrol, something like 4 litres of Petrol in a Diesel 750d xDrive will normally not necessarily be a huge problem. Experience has shown us that an amount less than 4 litres (5% of the fuel tank volume) is usually capable of being adequately diluted through entirely topping the tank with Diesel.
      It's extremely unusual to encounter an automobile suffering from issues because of below 5% incorrect fuel contamination. Bear in mind that it is very rare - definitely not impossible to encounter. There are some vehicles that won't endure any degree of contamination at all.
    2. In between 4 and 8 litres of Petrol in the BMW (5 to 10%) is more of a 50/50 condition. Our working experience has demonstrated that as many drivers get away with this as all those who break down. When you are deciding whether to risk it and just simply top it up consider that it is just like gambling everything on black - you've got a 50/50 chance of it working.
    3. Anything over 8 litres of Petrol in a Diesel 750d xDrive should right away be removed because your probability of succeeding with this amount of contamination is in all likelihood below one in 50 - truly big odds.
  2. Put some Petrol in a Diesel BMW and drove it: Have you detected any kind of performance troubles since putting the bad fuel in the 750d xDrive? If you have, have it removed regardless of the amount of Petrol or even the contamination ratio. Proceeding to run running a motor vehicle that is beginning to suffer from the effects of fuel contamination will probably only be responsible for increasing amounts of harm affecting your fuel system.
  3. Do you need security?
    Then simply just get it drained. Regardless of the contamination percentage, there is inevitably some extent of danger caused by driving a Diesel vehicle on fuel contaminated with Petrol. Probable consequences of driving on the wrong fuel include things like the engine refusing to start, running lumpy, loss of power, wearing of the high-pressure pump, damaged or bunged injectors, and so on. These are a few of the most common Petrol in Diesel warning signs, and if you observe any of them stop driving and have it drained right now.

Don't just get any unqualified so-and-so to try to fix your automobile. We are BMW specialists and have the qualifications and experience needed to make certain that you are back on the road with minimum hassle or trouble.

Put Petrol in a Diesel BMW

Unintentionally put Petrol in a Diesel BMW? Or perhaps even put contaminated fuel in your BMW 750d xDrive?

Contact us for Help & Guidance

Contact us and receive straightforward guidance and sensible help for your exact situation

We arrive and do a fuel drain

We can reach you to carry out the contaminated fuel retrieval & cleanse right there on scene

Once completed You Get Moving Again

When we have completed you can get back on your way and get on with your trip

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain specialists in the UK, offering national service, for BMW motorists in particular. We mainly fix:

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

We are BMW specialists and have successfully drained thousands of Diesel BMW vehicles. Whether or not it's at the roadside, on a station forecourt, or even at your house, we are able to get you on the road once again.

The Procedure

The technique of extracting Petrol from a Diesel car is in essence exactly the same for the majority of cars. Of course it does vary slightly as each manufacturer has their particular fuel system. Nevertheless it still essentially follows the following principles:

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

Petrol in Diesel FAQs

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.

Get in Touch

If you have any concerns or need our help please Call us!
We can get you going 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