Contaminated fuel in a BMW 745d? Petrol in a Diesel BMW?

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BMW Fuel Drain


Filling Petrol in a Diesel BMW is a very common mistake. And its remedy is dependent upon a number of factors. In the event that you would like to know what you must do about it then keep on reading.
These are the most important variables to take into account whenever figuring out whether to get the car drained:

  1. What level of Petrol did you put in to the BMW, taking into account that the fuel tank capacity of the BMW 745d is most likely about 88 litres?
    1. A tiny quantity of Petrol, something like 4.4 litres of Petrol in a Diesel 745d will more often than not not be a massive problem. Experience has demonstrated to us that anything under 4.4 litres (which is roughly 5% of the overall fuel tank volume) is often capable of being sufficiently diluted by completely topping up the tank with the correct fuel.
      It's quite uncommon to find a motor vehicle having issues due to under 5% incorrect fuel contamination. Please remember it is infrequent - definitely not impossible to find. You will discover some automobiles that don't endure any level of contamination in the slightest.
    2. In between 4.4 and 8.8 litres of Petrol in the BMW (5 to 10%) is really a 50/50 condition. Our practical experience has shown us that as many drivers get away with this as those who don't. Whenever deciding upon whether or not to risk it and simply top it up recognise that it is much like gambling everything on black - you have got a 50/50 possibility of it working out.
    3. Anything in excess of 8.8 litres of Petrol in a Diesel 745d must straightaway be removed because your likelihood of getting away with that quantity of contamination is certainly less than one in fifty - extremely big odds.
  2. Put Petrol in a Diesel BMW and drove it: Have you spotted any performance troubles since putting the wrong fuel in the 745d? If you have, have it emptied no matter the volume of Petrol or even the contamination percentage. Still running an automobile that is already starting to suffer the effect of fuel contamination will only bring about progressively more damage affecting the fuel system parts.
  3. Are you interested in assurance?
    Simply get it drained. No matter the contamination percentage, there is inevitably some amount of risk connected to driving a Diesel vehicle on fuel contaminated with Petrol. Possible implications of driving on the incorrect fuel can include the engine refusing to start, running lumpy, lack of power, degradation of the high-pressure pump, worn out or bunged injectors, and the like. These are several of the most common Petrol in Diesel symptoms, and should you observe any of them then stop and have it drained asap.

Don't simply get any unqualified mechanic to attend your car. We are BMW experts and have the accreditation and experience required to make certain you get back on the road with minimum hassle or trouble.

Put Petrol in a Diesel BMW

Accidentally put Petrol in a Diesel BMW? Or possibly even put contaminated fuel in your BMW 745d?

Contact us for Help & Recommendations

Contact us and receive sincere advice and sensible help for your exact circumstances

We show up and drain it

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

All done & You Get Going Again

Once we have finished you should be able to get back on the road and get on with your day

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain authorities in the UK, offering national cover, for BMW motorists particularly. We predominantly deal with:

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

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

The Procedure

The system of draining Petrol from a Diesel vehicle is fundamentally similar for the majority of motor vehicles. Of course it may vary a bit as each manufacturer has their particular different fuel system. Nevertheless it still adheres to 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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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.

Call us

In case you have any concerns or need help please Contact Us!
We are able to get you moving again.

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0333 366 0103

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

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