Incorrect fuel in a Mini Cooper D? Petrol in your Diesel Mini?

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Mini Fuel Drain


Filling up with Petrol in a Diesel Mini is a very common mistake. And what you need to do about it hinges on a few factors. If perhaps you would like to know what it is best to do to fix it then stay with me.
These are the most important variables to consider whenever making a decision whether or not to have your car drained:

  1. How much Petrol have you put into the Mini, keeping in mind that the fuel capacity of your Mini Cooper D is most likely roughly 40 litres?
    1. A small amount of Petrol, as little as 2 litres of Petrol in a Diesel Cooper D will normally not be a major problem. Experience has taught us that quantities less than 2 litres (about 5% of the total fuel tank) is generally capable of being adequately diluted simply by thoroughly topping up the rest of the tank with the appropriate fuel.
      It is very rare to encounter a vehicle experiencing difficulties with below 5% wrong fuel contamination. Bear in mind that it is very unusual - not impossible to encounter. You will discover a few vehicles that don't endure any level of contamination whatsoever.
    2. Somewhere between 2 and 4 litres of Petrol in the Mini (from 5 to 10%) is a 50/50 condition. Our expertise has demonstrated that as many motorists get away with this as those who break down. Whenever deciding upon whether to risk it and just simply top it up recognise that it is the same thing as wagering your car on black - you have a 50/50 chance of it working.
    3. Anything more than 4 litres of Petrol in your Diesel Cooper D really should promptly be drained out seeing that your likelihood of driving with that quantity of contamination is very likely below one in 50 - seriously long odds.
  2. Put some Petrol in a Diesel Mini and drove it: Have you noticed any kind of performance difficulties since putting the bad fuel in the Cooper D? If so, have it emptied irrespective of the quantity of Petrol or the contamination percentage. Still driving a motor vehicle that is starting to suffer the effect of fuel contamination will typically bring about more and more harm being done to your fuel system.
  3. Do you want peace of mind?
    Then simply just get it drained. Regardless of the contamination ratio, there is always a certain level of threat connected to operating a Diesel motor on Diesel contaminated with the incorrect fuel. Possible consequences of driving a car on the incorrect fuel can include the engine not starting, running unevenly, reduced power, degradation of the high-pressure pump, worn out or bunged injectors, and the like. These are some of the most common Petrol in Diesel warning signs, and if you observe any of them then stop and get it removed right away.

Keep away from having any jack-of-all-trades to try to fix your car. We are Mini experts and have got the qualifications and expertise needed to make certain you are back on the road with little hassle or trouble.

Put Petrol in a Diesel Mini

Mistakenly put Petrol in a Diesel Mini? Or even put contaminated fuel in your Mini Cooper D?

Contact us for Help & Recommendations

Call us and get reliable guidance and practical assistance for your specific situation

We show up and do a fuel drain

We would come to you to do the full contaminated fuel removal & cleanse there on scene

All done & You Get Moving Again

As soon as we have finished you will be able to get back on the road and get on with your day

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain experts in the UK, offering nationwide coverage, for Mini motorists especially. We mostly attend:

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

We are Mini specialists and have successfully drained thousands of Diesel Mini vehicles. Whether or not it is at the roadside, on a petrol station forecourt, or even at home, we can get you moving again.

The Procedure

The process of draining Petrol from a Diesel car is fundamentally the same for the vast majority of cars. Obviously it does vary a little as each brand has their own distinct fuel system. However it still fundamentally observes the following points:

Petrol in Diesel Mini

Fuel Drain

Empty the Fuel Tank

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Wrong Fuel Drain Mini

System Flush

Clean out the fuel lines & pumps

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Petrol in Diesel Drain Mini

Vehicle Restart

Get the car up and running again

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Petrol in Diesel FAQs

When someone has put Petrol in a Diesel car they have a few very common questions. So we have compiled a list of the most Frequently Asked Questions for you

I put Petrol in a Diesel 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 Diesel car on Petrol 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 Petrol can I get away with in a Diesel 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 Diesel 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

If you have any concerns or require some assistance please Call us!
We can get you going once again.

24/7 Mini Helpline

0333 366 0103

Our Business Office

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

Weekdays: 9am to 5pm

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