Bad fuel in your BMW 120i? Diesel in a Petrol BMW?

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BMW Fuel Drain


Putting Diesel in a Petrol BMW is a fairly typical problem. And its solution is determined by a variety of factors. If perhaps you would like to know what to do about it then stay with me.
These are the most important variables to think about whenever deciding whether to have the car drained:

  1. How much Diesel did you put into the BMW, taking into account that the fuel tank capacity of the BMW 120i is usually about 50 litres?
    1. Hardly any Diesel, as little as 2.5 litres of Diesel in a Petrol 120i will generally not really be a big problem. Experience has shown us that quantities less than 2.5 litres (approximately 5% of the entire fuel tank capacity) is generally capable of being sufficiently diluted by means of thoroughly filling up the tank with the appropriate fuel.
      It's extremely rare to find a motor vehicle going through issues with less than 5% incorrect fuel contamination. Keep in mind it is infrequently found - in no way impossible to encounter. There are actually some vehicles that will not endure any quantity of contamination in the slightest.
    2. Anywhere between 2.5 and 5 litres of Diesel in the BMW (5 to 10%) is really a 50/50 condition. Our experience has proven that as many people get away with it as those people who don't. When deciding whether or not to risk it and just simply fill it up recognise that it is much like wagering your car on black - you have got a 50/50 chance of it being ok.
    3. Anything over 5 litres of Diesel in a Petrol 120i should really straight away be removed since your probability of succeeding with this amount of contamination is very likely less than one in fifty - seriously long odds.
  2. Put Diesel in a Petrol BMW and drove it: Have you seen any performance problems as a result of putting the incorrect fuel in your 120i? If so, get it removed no matter the amount of Diesel or even the contamination percentage. Proceeding to drive driving an automobile that is now starting to suffer from the effects of fuel contamination will probably typically bring about more and more harm being caused to the fuel system parts.
  3. Do you want security?
    Then get it emptied. Whatever the contamination percentage, there is invariably some amount of danger in connection with operating a Petrol engine on Petrol contaminated with the wrong fuel. Possible results of driving a vehicle on the wrong fuel include things like the motor refusing to start, running lumpy, reduced power, wearing of the high-pressure pump, damaged or bunged injectors, and so forth. These are several of the most common Diesel in Petrol signs and symptoms, and in the event that you recognise any of them then cease driving and have it removed immediately.

Don't simply have any unqualified mechanic to try to repair your automobile. We are BMW experts and possess the certification and experience required to ensure that you get back on the road with a minimum of hassle or trouble.

Put Diesel in a Petrol BMW

Accidentally put Diesel in a Petrol BMW? Or even put contaminated fuel in your BMW 120i?

Give us a call for Assistance & Advice

Contact us and obtain honest advice and sensible help for your exact circumstance

We come out and do a fuel drain

We are able to come to you to do the complete fuel drain & cleanse there on scene

Once done You Get Moving Again

Once we have completed you can get back moving and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain professionals in the UK, offering nationwide cover, for BMW motorists especially. We typically deal with:

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

We are BMW specialists and have successfully drained thousands of Petrol BMW vehicles. Regardless of whether it's at the roadside, on a filling station forecourt, or even at your house, we are able to get you on the road again.

The Procedure

The procedure of draining Diesel from a Petrol vehicle is in essence identical for the vast majority of vehicle makes. As you can imagine it can differ a bit as each manufacturer has their own different fuel system. Nevertheless it still 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.

Call us

In case you have any questions or want our assistance please Call us!
We are able to get you moving again.

24 hour BMW Helpline

0333 366 0103

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

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