Wrong fuel in your BMW 335xi? Diesel in your Petrol BMW?

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BMW Fuel Drain


Filling up with Diesel in a Petrol BMW is a fairly typical mistake to make. And its remedy depends upon an assortment of factors. In case you would like to know what to do to sort it out then stay with me.
Listed here are the key variables to consider when choosing whether or not to get a fuel drain:

  1. How much Diesel did you put in to the BMW, keeping in mind that the fuel capacity of the BMW 335xi is normally around 63 litres?
    1. A tiny quantity of Diesel, as little as 3.15 litres of Diesel in a Petrol 335xi will typically not necessarily be a significant problem. Experience has demonstrated to us that quantities under 3.15 litres (which is almost 5% of the fuel tank volume) is often capable of being adequately diluted by means of completely filling up the remainder of the tank with the right fuel.
      It is very rare to come across a car or truck going through issues due to less than 5% wrong fuel contamination. Keep in mind it is very infrequently found - not impossible to encounter. You will discover some vehicles that will not endure any level of contamination whatsoever.
    2. Between 3.15 and 6.3 litres of Diesel in the BMW (from 5 to 10%) is really a 50/50 scenario. Our practical experience has shown that as many motorists get away with it as those people who break down. Any time you are deciding on whether or not to risk it and just simply top it up consider that it is the same thing as gambling it all on black - you will have a 50/50 chance of it being ok.
    3. Anything more than 6.3 litres of Diesel in your Petrol 335xi should really as soon as possible be drained since your likelihood of driving with that amount of contamination is almost certainly below one in fifty - definitely big odds.
  2. Put Diesel in a Petrol BMW and drove it: Have you detected any kind of performance difficulties after putting the incorrect fuel in your 335xi? If so, have it drained regardless of the amount of Diesel or even the contamination percentage. Continuing to drive running a car that is currently beginning to suffer the effect of wrong fuel contamination can typically result in increasing amounts of harm affecting the fuel system.
  3. Are you looking for peace of mind?
    Then get it emptied. No matter the contamination percentage, there is invariably some degree of danger caused by operating a Petrol engine on Petrol contaminated with Diesel. Probable results of driving a car on the incorrect fuel include things like the motor not starting, running lumpy, lack of power, wearing of the high-pressure pump, worn or clogged injectors, etc. These are some of the most frequently seen Diesel in Petrol symptoms, and if you recognise any of them stop and get it drained asap.

Don't simply get any unqualified so-and-so to try to fix your vehicle. We are BMW experts and have the skills and experience necessary to make sure that you get back on the road with little hassle or trouble.

Put Diesel in a Petrol BMW

Inadvertently put Diesel in a Petrol BMW? Or perhaps even put contaminated fuel in your BMW 335xi?

Contact us for Help & Recommendations

Call us and get honest recommendations and sensible assistance for your specific circumstances

We come out and drain it

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

Once performed You Get Moving Again

Once we are done you should be able to get back on your way and get on with your trip

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain professionals in the UK, boasting national service, for BMW motorists in particular. We mostly attend to:

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

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

The Procedure

The procedure of extracting Diesel from a Petrol vehicle is in essence exactly the same for virtually all vehicles. Needless to say it can vary to some degree as every brand has their own different fuel system. Having said that it still follows 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 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

In case you have any questions or require some assistance please Call us!
We are able to get you moving again.

24 hour BMW Helpline

0333 366 0103

Our Corporate Office

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


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