Wrong fuel in your BMW 123d? Petrol in a Diesel BMW?

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BMW Fuel Drain


Putting Petrol in a Diesel BMW is a very common mistake to make. And exactly what you need to do about it is determined by various factors. If perhaps you want to find out what it is advisable to do to fix it then keep on reading.
Right here are the main variables to consider whenever determining whether to have a fuel drain:

  1. What amount of Petrol did you put in the BMW, taking into consideration that the fuel capacity of your BMW 123d is usually around 51 litres?
    1. A small quantity of Petrol, less than 2.55 litres of Petrol in a Diesel 123d will in most cases not necessarily be a huge problem. Experience has shown us that an amount less than 2.55 litres (which is roughly 5% of the entire fuel tank volume) is sometimes able to be adequately diluted by means of entirely topping up the tank with the correct fuel.
      It's relatively rare to find a vehicle experiencing issues due to under 5% wrong fuel contamination. Keep in mind that it is very rare - definitely not impossible to find. There are certain vehicles that don't stand any level of fuel contamination whatsoever.
    2. Somewhere between 2.55 and 5.1 litres of Petrol in the BMW (5 to 10%) is a 50/50 condition. Our expertise has demonstrated that as many drivers get away with it as all those who break down. When figuring out whether or not to risk it and simply fill it up bear in mind that it is the same as gambling everything on black - you have a 50/50 chance of it being ok.
    3. Anything above 5.1 litres of Petrol in your Diesel 123d ought to as soon as possible be drained as your likelihood of getting away with this quantity of contamination is certainly less than one in fifty - seriously huge odds.
  2. Put Petrol in a Diesel BMW and drove it: Have you noted any performance difficulties since putting the wrong fuel in the 123d? In that case, have it drained irrespective of the amount of Petrol or even the contamination ratio. Still running a motor vehicle that is already starting to suffer the consequences of wrong fuel contamination can just bring about more damage affecting your fuel system.
  3. Do you want reassurance?
    In that case get it drained. Regardless of the contamination ratio, there is always some extent of danger connected with driving a Diesel vehicle on fuel contaminated with Petrol. Likely implications of driving on the incorrect fuel include the engine not starting, running lumpy, loss of power, degradation of the high-pressure pump, worn or bunged injectors, etc. These are some of the commonest Petrol in Diesel warning signs, and if you notice any of them then stop driving and get it removed right now.

Avoid having any unqualified mechanic to try to drain your vehicle. We are BMW specialists and possess the certification and knowledge necessary to ensure you get back on the road with minimum hassle or worry.

Put Petrol in a Diesel BMW

Mistakenly put Petrol in a Diesel BMW? Or possibly even put contaminated fuel in your BMW 123d?

Call us for Help & Advice

Give us a call and receive straightforward recommendations and practical help for your exact circumstances

We arrive and drain it

We are able to go to you to do the complete contaminated fuel removal & flush there on scene

Once done You Get Going Once again

When we have completed you are able to get back on your way and get on with your trip

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain professionals in the UK, having nationwide coverage, for BMW motorists particularly. We principally attend:

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

We are BMW specialists and have successfully drained thousands of Diesel BMW vehicles. No matter if it's roadside, on a filling station forecourt, or even at home, we can get you going once again.

The Process

The procedure of extracting Petrol from a Diesel vehicle is generally similar for the vast majority of vehicles. Obviously it may vary to some extent as every manufacturer has their particular distinct fuel system. Having said that it still fundamentally follows the below 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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Petrol in Diesel Questions

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.

Contact Us

If you have any queries or need some help please Contact Us!
We are able to get you going once again.

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0333 366 0103

Our Corporate Office

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


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