Bad fuel in your BMW 318i? Diesel in a Petrol BMW?

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BMW Fuel Drain


Filling up with Diesel in a Petrol BMW is a regular error. And exactly what you need to do about it is determined by a variety of factors. Assuming you would like to find out what you have to do about it then continue reading.
Here are the main variables to be aware of when choosing whether or not to have your car drained:

  1. What level of Diesel have you put in to the BMW, bearing in mind that the fuel tank capacity of your BMW 318i is in most cases about 65 litres?
    1. A tiny amount of Diesel, as little as 3.25 litres of Diesel in a Petrol 318i will quite often not necessarily be a big problem. Experience has proven to us that anything less than 3.25 litres (approximately 5% of the overall fuel tank capacity) is often capable of being completely diluted by means of totally filling up the rest of the tank with Petrol.
      It's extremely rare to come across a car experiencing difficulties due to lower than 5% incorrect fuel contamination. Keep in mind it is infrequent - not impossible to find. There are actually certain cars that will not stand any quantity of contamination whatsoever.
    2. In between 3.25 and 6.5 litres of Diesel in the BMW (5 to 10%) is really a 50/50 condition. Our practical experience has revealed that as many motorists get away with it as all those who don't. Whenever deciding upon whether or not to risk it and simply top it up recognise that it is exactly like wagering all of it on black - you have a 50/50 chance of it being ok.
    3. Anything above 6.5 litres of Diesel in your Petrol 318i must straight away be drained out since your probability of succeeding with this amount of contamination is almost certainly lower than one in 50 - seriously huge odds.
  2. Put Diesel in a Petrol BMW and drove it: Have you observed any performance difficulties ever since putting the wrong fuel in your 318i? If that's the case, have it emptied regardless of the amount of Diesel or the contamination ratio. Continuing to run running a motor vehicle that is starting to suffer from the effect of wrong fuel contamination will probably typically lead to increasing amounts of harm affecting the fuel system.
  3. Are you interested in security?
    Then get it drained. Regardless of contamination ratio, there is always some degree of risk associated with driving a Petrol motor on Petrol contaminated with the wrong fuel. Possible final outcomes of driving on the wrong fuel can include the engine refusing to start, running unevenly, decrease in power, wearing of the high-pressure pump, damaged or blocked injectors, and so forth. These are a few of the most typical Diesel in Petrol signs and symptoms, and in the event that you observe any of them then stop and have it removed right now.

Refrain from having any unqualified so-and-so to attend your car. We are BMW experts and possess the credentials and experience necessary to make certain you are back on the road with little hassle or worry.

Put Diesel in a Petrol BMW

By mistake put Diesel in a Petrol BMW? Or even put contaminated fuel in your BMW 318i?

Contact us for Assistance & Advice

Call us and receive straightforward guidance and sensible assistance for your precise situation

We come out and drain it

We are able to reach you to carry out the full fuel drain & flush there on scene

All done & You Get Moving Again

As soon as we have completed you should be able to get back moving and get on with your day

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain professionals in the UK, offering national service, for BMW motorists particularly. We mainly attend to:

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

We are BMW specialists and have successfully drained hundreds of Petrol BMW vehicles. Regardless of whether it is roadside, on a petrol station forecourt, or even at your home, we can get you moving again.

The Process

The system of getting rid of Diesel from a Petrol car is generally exactly the same for most cars. Of course it does vary a bit as each make has their particular distinct fuel system. Even so it still essentially observes the following points:

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 case you have any queries or need some help please Contact Us!
We are able to get you going again.

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0333 366 0103

Our Corporate Office

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

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