Wrong fuel in your BMW 520i Touring? Diesel in a Petrol BMW?

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BMW Fuel Drain


Putting Diesel in a Petrol BMW is a regularly occurring error. And its solution hinges on several factors. In the event that you would like to find out what you should do to fix it then continue reading.
Here are the most crucial variables to be aware of when deciding on whether or not to have the car drained:

  1. What amount of Diesel did you put into the BMW, bearing in mind that the fuel tank capacity of the BMW 520i Touring is probably approximately 70 litres?
    1. A tiny quantity of Diesel, less than 3.5 litres of Diesel in a Petrol 520i Touring will in most cases not be a big problem. Experience has demonstrated to us that an amount under 3.5 litres (which is almost 5% of the fuel tank) is quite often capable of being adequately diluted by means of wholly topping the remainder of the tank with Petrol.
      It is highly rare to come across a vehicle going through difficulties because of under 5% incorrect fuel contamination. Bear in mind that it's uncommon - certainly not impossible to encounter. There are a few cars that don't stand any quantity of fuel contamination at all.
    2. Anywhere between 3.5 and 7 litres of Diesel in the BMW (from 5 to 10%) is really a 50/50 scenario. Our expertise has demonstrated that as many people get away with this as all those who break down. Whenever you are trying to decide whether or not to chance it and basically fill it up consider that it is much like wagering everything on black - you will have a 50/50 possibility of it working out.
    3. Anything above 7 litres of Diesel in a Petrol 520i Touring should straight away be drained seeing as your probability of driving with this amount of contamination is undoubtedly less than one in 50 - definitely big odds.
  2. Put some Diesel in a Petrol BMW and drove it: Have you seen any performance issues since putting the bad fuel in your 520i Touring? If you have, have it emptied regardless of the volume of Diesel or even the contamination ratio. Continuing to run driving a car that is currently beginning to suffer from the effects of fuel contamination can typically bring about increasing amounts of damage being caused to your fuel system.
  3. Would you like reassurance?
    In that case get it removed. No matter the contamination ratio, there is invariably a certain level of risk connected with running a Petrol motor on Petrol contaminated with Diesel. Likely consequences of driving on the incorrect fuel include things like the motor refusing to start, running unevenly, reduced power, wearing of the high-pressure pump, worn or blocked injectors, and the like. These are several of the commonest Diesel in Petrol signs or symptoms, and if you notice any of them stop driving and get it drained immediately.

Refrain from getting any unqualified mechanic to attend your automobile. We are BMW experts and have the credentials and practical experience needed to make certain you get back on the road with minimum hassle or worry.

Put Diesel in a Petrol BMW

Unintentionally put Diesel in a Petrol BMW? Or possibly even put contaminated fuel in your BMW 520i Touring?

Call us for Help & Recommendations

Contact us and receive genuine advice and sensible help for your exact situation

We arrive and drain it

We are able to reach you to do the full fuel removal & cleanse there on scene

All done & You Get Moving Again

Once we have completed you should be able to get back on the road and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain authorities in the UK, having countrywide service, for BMW motorists particularly. We typically fix:

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

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

The Process

The process of getting rid of Diesel from a Petrol car is essentially similar for the majority of cars. Needless to say it may differ slightly as each make has their particular fuel system. Even so it still fundamentally 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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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

In the event that you have any queries or want assistance please Contact Us!
We can get you on the road again.

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0333 366 0103

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

Weekdays: 9am to 5pm

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