Bad fuel in your BMW 750Li xDrive? Diesel in your Petrol BMW?

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BMW Fuel Drain


Putting Diesel in a Petrol BMW is a regularly occurring error. And what you need to do about it hinges on several factors. If perhaps you want to find out what you have to do to sort it out then keep on reading.
Listed below are the key variables to think about whenever determining whether or not to have a fuel drain:

  1. What level of Diesel did you put in the BMW, taking into account that the fuel tank capacity of your BMW 750Li xDrive is in most cases around 82 litres?
    1. A small amount of Diesel, as little as 4.1 litres of Diesel in a Petrol 750Li xDrive will normally not necessarily be a significant problem. Experience has taught us that anything under 4.1 litres (which is almost 5% of the fuel tank) is very often capable of being completely diluted by means of entirely filling the rest of the tank with the right fuel.
      It's pretty unusual to come across a motor vehicle suffering from issues because of under 5% incorrect fuel contamination. Keep in mind that it is very rare - certainly not impossible to encounter. You can get some vehicles that will not endure any quantity of contamination at all.
    2. Somewhere between 4.1 and 8.2 litres of Diesel in the BMW (5 to 10%) is more of a 50/50 scenario. Our expertise demonstrates that as many people get away with this as those people who don't. Any time you're deciding whether or not to chance it and just simply fill it up bear in mind that it is the same thing as wagering your car on black - you will have a 50/50 possibility of it being ok.
    3. Anything in excess of 8.2 litres of Diesel in a Petrol 750Li xDrive must as soon as possible be removed as your likelihood of getting away with this amount of contamination is very likely less than one in fifty - really huge odds.
  2. Put Diesel in a Petrol BMW and drove it: Have you observed any kind of performance troubles after putting the incorrect fuel in your 750Li xDrive? If so, get it removed irrespective of the volume of Diesel or even the contamination percentage. Proceeding to drive driving a motor vehicle that is beginning to suffer from the effect of wrong fuel contamination will likely result in more and more damage affecting your fuel system parts.
  3. Do you want reassurance?
    Simply get it removed. Whatever the contamination percentage, there is invariably some amount of threat associated with running a Petrol engine on Petrol contaminated with the incorrect fuel. Possible outcomes of driving a vehicle on the incorrect fuel include things like the motor refusing to start, running unevenly, lack of power, degradation of the high-pressure pump, worn out or blocked injectors, and the like. These are several of the most frequently seen Diesel in Petrol signs or symptoms, and in the event that you observe any of them stop and get it drained immediately.

Do not simply get any untrained so-and-so to attend your car. We are BMW specialists and possess the accreditation and experience required to make certain that you are back on the road with minimum hassle or trouble.

Put Diesel in a Petrol BMW

By mistake put Diesel in a Petrol BMW? Or perhaps even put contaminated fuel in your BMW 750Li xDrive?

Call us for Assistance & Advice

Call us and receive reliable advice and sensible assistance for your particular situation

We come out and drain it

We are able to come to you to do the complete contaminated fuel removal & clean right there on scene

Once done You Get Going Again

When we are done you can get back on your way and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain professionals in the UK, offering nationwide service, for BMW motorists particularly. We primarily deal with:

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

We are BMW specialists and have successfully drained hundreds of Petrol BMW vehicles. Even if it is roadside, on a petrol station forecourt, or even at your home, we can get you going once again.

The Procedure

The method of extracting Diesel from a Petrol car is essentially the same for the majority of motor vehicles. Of course it can vary a bit as each make has their unique different fuel system. Having said that it still essentially 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 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.

Contact Us

In case you have any questions or need assistance please Call us!
We can get you moving once 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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