Contaminated fuel in a BMW 523i Touring? Diesel in your Petrol BMW?

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BMW Fuel Drain


Filling up with Diesel in a Petrol BMW is a common mistake. And what you should do about it varies according to several factors. Assuming you would like to find out what it is advisable to do to sort it out then stay with me.
Listed here the main variables to to consider when deciding on whether or not to have a fuel drain:

  1. How much Diesel have you put in to the BMW, taking into consideration that the fuel tank capacity of your BMW 523i Touring is probably roughly 70 litres?
    1. A small quantity of Diesel, less than 3.5 litres of Diesel in a Petrol 523i Touring will usually not really be a huge problem. Experience has shown us that anything under 3.5 litres (which is 5% of the total fuel tank capacity) is often able to be completely diluted by means of entirely topping the rest of the tank with the correct fuel.
      It is highly uncommon to find a car having difficulties with below 5% wrong fuel contamination. Do not forget that it is infrequent - definitely not impossible to encounter. There are some motor vehicles that don't stand any amount of fuel contamination in the slightest.
    2. Between 3.5 and 7 litres of Diesel in the BMW (5 to 10%) is really a 50/50 condition. Our expertise has shown us that as many drivers get away with it as those who break down. When you are figuring out whether or not to risk it and just fill it up remember that it is the same as gambling your car on black - you have a 50/50 possibility of it working.
    3. Anything over 7 litres of Diesel in your Petrol 523i Touring ought to immediately be drained out since your likelihood of getting away with that amount of contamination is probably less than one in 50 - definitely big odds.
  2. Put Diesel in a Petrol BMW and drove it: Have you spotted any performance problems ever since putting the wrong fuel in the 523i Touring? In that case, have it drained irrespective of the amount of Diesel or even the contamination ratio. Continually running a car that is beginning to suffer from the effect of fuel contamination can only end up in more harm affecting your fuel system components.
  3. Do you need peace of mind?
    In that case get it removed. Regardless of contamination percentage, there is inevitably some extent of risk connected to driving a Petrol vehicle on fuel contaminated with the incorrect fuel. Likely outcomes of driving a car on the wrong fuel normally include the engine refusing to start, running unevenly, reduced power, wearing of the high-pressure pump, damaged or bunged injectors, and so on. These are a few of the most common Diesel in Petrol symptoms, and if you observe any of them then stop and have it removed right now.

Do not just have any jack-of-all-trades to attend your vehicle. We are BMW experts and have got the credentials and working experience required to ensure that you are back on the road with minimum hassle or trouble.

Put Diesel in a Petrol BMW

Accidentally put Diesel in a Petrol BMW? Or possibly even put contaminated fuel in your BMW 523i Touring?

Contact us for Help & Advice

Contact us and get straightforward advice and practical help for your particular circumstance

We show up and do the fuel drain

We would come to you to carry out the full fuel removal & purge there on scene

Once carried out You Get Moving Once again

Once we have finished you can get back on the road and get on with your trip

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain specialists in the UK, offering national coverage, for BMW motorists particularly. We mostly attend to:

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

We are BMW specialists and have successfully drained thousands of Petrol BMW vehicles. Even if it's roadside, on a filling station forecourt, or even at your house, we are able to get you on the road once again.

The Procedure

The system of getting rid of Diesel from a Petrol vehicle is essentially exactly the same for the vast majority of vehicles. As you can imagine it may vary slightly as each manufacturer has their unique different fuel system. Nevertheless it still basically adheres to the below points:

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.

Call us

If you have any enquiries or require help please Contact Us!
We are able to get you going once again.

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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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