Wrong fuel in your BMW 518d? Petrol in your Diesel BMW?

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BMW Fuel Drain


Filling Petrol in a Diesel BMW is a usual error. And exactly what you have to do about it hinges on a number of things. Assuming you would like to find out what you must do to fix it then read on.
Right here are the key factors to take into account when determining whether to have your car drained:

  1. What level of Petrol did you put into the BMW, taking into account that the fuel capacity of the BMW 518d is probably around 70 litres?
    1. A small amount of Petrol, as little as 3.5 litres of Petrol in a Diesel 518d will quite often not necessarily be a big problem. Experience has proven to us that quantities less than 3.5 litres (which is close to 5% of the whole fuel tank capacity) is in many instances capable of being adequately diluted through entirely topping up the remainder of the tank with the appropriate fuel.
      It is quite uncommon to come across an automobile experiencing problems because of less than 5% incorrect fuel contamination. Be aware that it's uncommon - certainly not impossible to encounter. You will discover some motor vehicles that will not stand any level of fuel contamination at all.
    2. In between 3.5 and 7 litres of Petrol in the BMW (from 5 to 10%) is a 50/50 condition. Our working experience has confirmed that as many people get away with this as those people who break down. When deciding on whether to chance it and just simply fill it up bear in mind that it is exactly like betting it all on black - you've got a 50/50 chance of it working out.
    3. Anything in excess of 7 litres of Petrol in a Diesel 518d really should straight away be removed as your probability of getting away with this amount of contamination is more than likely lower than one in fifty - truly big odds.
  2. Put some Petrol in a Diesel BMW and drove it: Have you observed any kind of performance concerns ever since putting the bad fuel in your 518d? In that case, have it removed regardless of the volume of Petrol or even the contamination ratio. Continuing to run running a car that is now beginning to suffer the effects of fuel contamination will only be responsible for even more harm affecting your fuel system.
  3. Would you like peace of mind?
    Simply get it emptied. Regardless of contamination percentage, there is invariably some degree of threat affiliated with running a Diesel engine on fuel contaminated with Petrol. Probable consequences of driving on the incorrect fuel include the engine refusing to start, running unevenly, loss in power, wearing of the high-pressure pump, damaged or bunged injectors, and the like. These are a few of the most typical Petrol in Diesel signs or symptoms, and if you notice any of them then cease driving and get it drained right away.

Refrain from having any unqualified mechanic to try to repair your car. We are BMW specialists and have got the qualifications and experience necessary to ensure you are back on the road with a minimum of hassle or worry.

Put Petrol in a Diesel BMW

Mistakenly put Petrol in a Diesel BMW? Or perhaps even put contaminated fuel in your BMW 518d?

Contact us for Assistance & Recommendations

Call us and receive genuine recommendations and sensible assistance for your particular situation

We come out and do the fuel drain

We would go to you to undertake the full contaminated fuel drain & flush right there on scene

Once carried out You Get Moving Once again

As soon as we have completed you can get back on the road and get on with your trip

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain authorities in the UK, boasting national cover, for BMW motorists in particular. We principally deal with:

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

We are BMW specialists and have successfully drained hundreds of Diesel BMW vehicles. Whether or not it is at the roadside, on a station forecourt, or even at your house, we can get you going once again.

The Process

The system of extracting Petrol from a Diesel car is essentially exactly the same for the majority of vehicles. As you can imagine it can vary to some degree as every brand has their unique fuel system. Having said that it still basically adheres to 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.

Get in Touch

Should you have any concerns or need some assistance please Call us!
We are able to get you moving again.

24/7 BMW Helpline

0333 366 0103

Our Corporate Office

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


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