Incorrect fuel in your BMW 535i? Diesel in a Petrol BMW?

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BMW Fuel Drain


Filling up with Diesel in a Petrol BMW is a regularly occurring mistake to make. And its remedy is dependent upon various things. In the event that you want to know what you ought to do to fix it then please read on.
Listed here are the most important factors to keep in mind whenever determining whether or not to have your car drained:

  1. What level of Diesel have you put into the BMW, taking into consideration that the fuel capacity of your BMW 535i is most likely approximately 70 litres?
    1. A modest quantity of Diesel, less than 3.5 litres of Diesel in a Petrol 535i will quite often not necessarily be a massive problem. Experience has demonstrated to us that quantities less than 3.5 litres (which is almost 5% of the entire fuel tank) is oftentimes capable of being sufficiently diluted by means of entirely topping up the tank with Petrol.
      It is quite uncommon to come across a motor vehicle suffering from problems with below 5% wrong fuel contamination. Bear in mind that it is infrequent - definitely not impossible to encounter. You will discover a number of motor vehicles that don't endure any amount of contamination in the slightest.
    2. Anywhere between 3.5 and 7 litres of Diesel in the BMW (from 5 to 10%) is a 50/50 situation. Our working experience has revealed that as many drivers get away with this as those people who don't. When you are deciding upon whether or not to risk it and just simply top it up recognise that it is the same as wagering it all on black - you've got a 50/50 chance of it working out.
    3. Anything above 7 litres of Diesel in your Petrol 535i ought to straight away be removed since your probability of getting away with that amount of contamination is certainly lower than one in 50 - extremely big odds.
  2. Put Diesel in a Petrol BMW and drove it: Have you seen any kind of performance issues as a result of putting the bad fuel in the 535i? If that's the case, have it emptied irrespective of the volume of Diesel or even the contamination percentage. Continually running a car that is already beginning to suffer from the effects of wrong fuel contamination will definitely be responsible for even more harm being done to your fuel system parts.
  3. Would you like peace of mind?
    Then get it removed. No matter the contamination percentage, there is always some degree of risk associated with operating a Petrol motor on Petrol contaminated with Diesel. Possible outcomes of driving on the wrong fuel include things like the motor not starting, running lumpy, decrease in power, wearing of the high-pressure pump, worn or bunged injectors, and so on. These are some of the most typical Diesel in Petrol signs or symptoms, and in the event that you notice any of them stop and get it drained as soon as possible.

Do not just have any unqualified mechanic to try to fix your vehicle. We are BMW specialists and have the qualifications and knowledge needed to make certain you get back on the road with no hassle or trouble.

Put Diesel in a Petrol BMW

Mistakenly put Diesel in a Petrol BMW? Or even put contaminated fuel in your BMW 535i?

Contact us for Help & Advice

Give us a call and obtain sincere advice and practical help for your exact situation

We arrive and drain it

We can reach you to perform the full fuel retrieval & flush right there on scene

All done & You Get Moving Once again

As soon as we are done you will be able to get back on your way and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain specialists in the UK, having countrywide coverage, for BMW motorists in particular. We principally deal with:

  • Unleaded petrol in Diesel Auto
  • Diesel in an Unleaded Petrol Vehicle
  • AdBlue contamination
  • Water contamination

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

The Process

The technique of getting rid of Diesel from a Petrol vehicle is generally identical for virtually all vehicles. Of course it does vary to some degree as every brand has their own different fuel system. However it still essentially follows 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.

Contact Us

If you have any enquiries or require our help please Call us!
We are able to get you on the road once 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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