Wrong fuel in your BMW 328i? Diesel in a Petrol BMW?

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BMW Fuel Drain


Putting Diesel in a Petrol BMW is a very common mistake to make. And its remedy varies according to various factors. In case you want to know what you should do to fix it then read on.
These are the main factors to take into consideration whenever figuring out whether or not to have a fuel drain:

  1. Exactly how much Diesel have you put in to the BMW, bearing in mind that the fuel tank capacity of the BMW 328i is in most cases about 65 litres?
    1. A small quantity of Diesel, something like 3.25 litres of Diesel in a Petrol 328i will in most situations not really be a huge problem. Experience has demonstrated to us that an amount less than 3.25 litres (5% of the entire fuel tank) is oftentimes able to be sufficiently diluted simply by totally topping the remainder of the tank with Petrol.
      It is highly uncommon to encounter a motor vehicle experiencing difficulties because of lower than 5% incorrect fuel contamination. Do not forget that it is very infrequently found - in no way impossible to find. There are actually a few automobiles that don't endure any degree of contamination whatsoever.
    2. Somewhere between 3.25 and 6.5 litres of Diesel in the BMW (5 to 10%) is a 50/50 condition. Our practical experience has shown that as many drivers get away with this as those people who don't. Whenever you are trying to decide whether or not to chance it and just simply fill it up remember that it is the same thing as gambling it all on black - you will have a 50/50 possibility of it working out.
    3. Anything in excess of 6.5 litres of Diesel in your Petrol 328i should really right away be removed as your probability of driving with that level of contamination is undoubtedly below one in fifty - seriously big odds.
  2. Put Diesel in a Petrol BMW and drove it: Have you seen any kind of performance issues after putting the bad fuel in the 328i? If so, have it drained no matter the amount of Diesel or the contamination ratio. Continually driving a motor vehicle that is currently beginning to suffer the effects of fuel contamination will probably likely result in increasing amounts of harm affecting the fuel system.
  3. Are you looking for security?
    In that case get it emptied. Whatever the contamination ratio, there is inevitably some amount of risk connected to running a Petrol motor on Petrol contaminated with the incorrect fuel. Likely outcomes of driving on the wrong fuel include the motor refusing to start, running lumpy, reduced power, wearing of the high-pressure pump, worn out or clogged injectors, and the like. These are some of the most common Diesel in Petrol signs and symptoms, and should you detect any of them then cease driving and get it removed as soon as possible.

Keep away from getting any jack-of-all-trades to attend your automobile. We are BMW specialists and have the credentials and experience needed to make certain that you get back on the road with minimal hassle or worry.

Put Diesel in a Petrol BMW

Mistakenly put Diesel in a Petrol BMW? Or even put contaminated fuel in your BMW 328i?

Call us for Assistance & Guidance

Contact us and receive reliable recommendations and sensible help for your exact circumstance

We show up and drain it

We would come to you to perform the complete fuel drain & flush there on scene

Once done You Get Going Once again

Once we have completed you will be able to get back moving and get on with your trip

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain specialists in the UK, having national coverage, for BMW motorists especially. We mainly deal with:

  • Unleaded petrol in a Diesel Vehicle
  • Diesel in your Unleaded Petrol Car
  • AdBlue contamination
  • Water contamination

We are BMW specialists and have successfully drained thousands of Petrol BMW vehicles. Whether or not it is roadside, on a petrol station forecourt, or even at home, we can get you moving again.

The Process

The system of draining Diesel from a Petrol car is in essence identical for most vehicles. Obviously it may vary somewhat as each manufacturer has their own distinct fuel system. Nevertheless it still fundamentally adheres to the following guidelines:

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.

Get in Touch

Should you have any concerns or want some help please Call us!
We are able to get you on the road 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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