Incorrect fuel in a BMW 330i? Diesel in a Petrol BMW?

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BMW Fuel Drain


Filling up with Diesel in a Petrol BMW is a well-known problem. And its solution depends upon a variety of factors. In the event that you would like to find out what it is best to do to sort it out then read on.
These are the main factors to to consider whenever making a decision whether or not to have it drained:

  1. How much Diesel did you put in the BMW, keeping in mind that the fuel capacity of your BMW 330i is in most cases around 63 litres?
    1. A modest amount of Diesel, something like 3.15 litres of Diesel in a Petrol 330i will in most situations not really be a big problem. Experience has proven to us that an amount under 3.15 litres (which is roughly 5% of the overall fuel tank) is sometimes able to be adequately diluted through wholly topping up the tank with the appropriate fuel.
      It's rather unusual to find an automobile going through issues due to less than 5% incorrect fuel contamination. Keep in mind that it is unusual - definitely not impossible to find. You can get a few vehicles that don't stand any degree of contamination at all.
    2. In between 3.15 and 6.3 litres of Diesel in the BMW (from 5 to 10%) is a 50/50 condition. Our practical experience has shown us that as many people get away with it as those who don't. Whenever figuring out whether to chance it and basically top it up bear in mind that it is much like wagering everything on black - you've got a 50/50 possibility of it being ok.
    3. Anything over 6.3 litres of Diesel in your Petrol 330i really should as soon as possible be removed as your likelihood of succeeding with that amount of contamination is in all likelihood less than one in fifty - truly long odds.
  2. Put some Diesel in a Petrol BMW and drove it: Have you seen any performance difficulties ever since putting the wrong fuel in your 330i? If that's the case, have it emptied no matter the volume of Diesel or even the contamination ratio. Proceeding to run running a motor vehicle that is beginning to suffer from the effects of wrong fuel contamination will probably definitely result in increasing amounts of damage affecting your fuel system.
  3. Would you like security?
    Then get it emptied. Whatever the contamination ratio, there is always a certain level of risk caused by operating a Petrol vehicle on fuel contaminated with Diesel. Likely implications of driving on the wrong fuel include things like the motor not starting, running lumpy, lack of power, degradation of the high-pressure pump, worn out or bunged injectors, etc. These are some of the most frequently seen Diesel in Petrol signs or symptoms, and if you detect any of them stop driving and have it removed right away.

Do not simply have any unqualified so-and-so to try to drain your car. We are BMW experts and have got the skills and knowledge necessary to make certain you are back on the road with a minimum of hassle or worry.

Put Diesel in a Petrol BMW

Mistakenly put Diesel in a Petrol BMW? Or possibly even put contaminated fuel in your BMW 330i?

Contact us for Help & Advice

Contact us and receive reliable advice and sensible assistance for your particular circumstance

We show up and do the fuel drain

We are able to reach you to do the full contaminated fuel drain & flush right there on scene

Once carried out You Get Moving Again

Once we have completed you are able to get back on your way and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain experts in the UK, offering countrywide service, for BMW motorists in particular. We primarily fix:

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

We are BMW specialists and have successfully drained thousands of Petrol BMW vehicles. Whether it is roadside, on a station forecourt, or even at your house, we can get you on the road again.

The Procedure

The system of getting rid of Diesel from a Petrol vehicle is basically similar for virtually all cars. As you can imagine it does differ to some extent as each manufacturer has their particular different fuel system. Having said that it still generally 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 FAQs

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.

Contact Us

In the event that you have any questions or need our assistance please Call us!
We can 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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