Wrong fuel in your BMW 325i? Diesel in your Petrol BMW?

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BMW Fuel Drain


Filling Diesel in a Petrol BMW is a well-known mistake. And its remedy varies according to an assortment of factors. If perhaps you want to find out what to do to fix it then keep on reading.
Let us discuss the most important variables to keep in mind when deciding whether to get your car drained:

  1. Exactly how much Diesel did you put in to the BMW, keeping in mind that the fuel tank capacity of the BMW 325i is most likely about 65 litres?
    1. A modest quantity of Diesel, as little as 3.25 litres of Diesel in a Petrol 325i will more often than not not really be a major problem. Experience has shown us that quantities less than 3.25 litres (roughly 5% of the entire fuel tank volume) is often capable of being sufficiently diluted by means of entirely topping up the tank with the appropriate fuel.
      It's extremely rare to come across a car having difficulties because of lower than 5% incorrect fuel contamination. Remember that it is very rare - not impossible to find. You can get a number of automobiles that will not stand any degree of fuel contamination in the slightest.
    2. Somewhere between 3.25 and 6.5 litres of Diesel in the BMW (5 to 10%) is more of a 50/50 scenario. Our working experience has confirmed that as many motorists get away with this as those who break down. Any time you are deciding upon whether or not to chance it and just simply top it up consider that it is exactly like betting everything on black - you will have a 50/50 chance of it being ok.
    3. Anything over 6.5 litres of Diesel in your Petrol 325i should as soon as possible be drained out as your probability of succeeding with that level of contamination is probably below one in 50 - seriously huge odds.
  2. Put Diesel in a Petrol BMW and drove it: Have you spotted any performance issues since putting the incorrect fuel in your 325i? If that's the case, get it drained no matter the volume of Diesel or even the contamination ratio. Still driving a vehicle that is now starting to suffer from the consequences of wrong fuel contamination will probably typically end up in more harm affecting the fuel system parts.
  3. Do you want security?
    Then get it removed. Whatever the contamination ratio, there is inevitably some amount of risk associated with driving a Petrol engine on Petrol contaminated with Diesel. Probable outcomes of driving a vehicle on the incorrect fuel normally include the engine refusing to start, running unevenly, reduced power, degradation of the high-pressure pump, worn out or blocked injectors, etc. These are several of the most typical Diesel in Petrol signs and symptoms, and should you detect any of them then stop and get it drained as soon as possible.

Do not simply get any unqualified mechanic to try to fix your automobile. We are BMW experts and possess the credentials and knowledge needed to make certain you are back on the road with no hassle or worry.

Put Diesel in a Petrol BMW

Inadvertently put Diesel in a Petrol BMW? Or possibly even put contaminated fuel in your BMW 325i?

Call us for Help & Recommendations

Call us and get sincere advice and practical help for your particular circumstance

We arrive and do the fuel drain

We would reach you to do the contaminated fuel retrieval & flush right there on scene

Once done You Get Moving Again

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

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain authorities in the UK, boasting national coverage, for BMW motorists particularly. We mostly deal with:

  • Unleaded petrol in a Diesel Car
  • Diesel in an Unleaded Petrol Auto
  • AdBlue contamination
  • Water contamination

We are BMW specialists and have successfully drained hundreds of Petrol BMW vehicles. Whether or not it is roadside, on a petrol station forecourt, or even at your home, we are able to get you on the road once again.

The Procedure

The technique of draining Diesel from a Petrol vehicle is generally exactly the same for most vehicle makes. As you can imagine it can differ a bit as each brand has their particular fuel system. Having said that it still generally 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 case you have any queries or need some help please Call us!
We can get you going 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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