Wrong fuel in your BMW 318Ci? Diesel in your Petrol BMW?

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BMW Fuel Drain


Filling up with Diesel in a Petrol BMW is a fairly typical problem. And its solution varies according to a number of things. Assuming you want to know what it is best to do about it then continue reading.
These are the most important factors to consider when determining whether or not to have a fuel drain:

  1. What level of Diesel did you put in the BMW, taking into account that the fuel capacity of the BMW 318Ci is probably about 63 litres?
    1. A small amount of Diesel, something like 3.15 litres of Diesel in a Petrol 318Ci will quite often not really be a massive problem. Experience has taught us that quantities less than 3.15 litres (5% of the fuel tank) is quite often able to be adequately diluted by totally topping the remainder of the tank with Petrol.
      It is very uncommon to come across an automobile suffering from difficulties because of under 5% wrong fuel contamination. Do not forget that it is unusual - certainly not impossible to encounter. There are actually some cars that will not stand any degree of fuel contamination at all.
    2. Anywhere between 3.15 and 6.3 litres of Diesel in the BMW (5 to 10%) is really a 50/50 situation. Our expertise has demonstrated that as many motorists get away with it as those who break down. When you are deciding upon whether to chance it and just simply fill it up consider that it is very much like betting all of it on black - you will have a 50/50 chance of it working out.
    3. Anything over 6.3 litres of Diesel in a Petrol 318Ci ought to as soon as possible be drained out seeing that your probability of succeeding with that amount of contamination is almost certainly less than one in 50 - definitely long odds.
  2. Put some Diesel in a Petrol BMW and drove it: Have you noticed any performance issues after putting the bad fuel in the 318Ci? If you have, get it drained regardless of the amount of Diesel or the contamination percentage. Still running a vehicle that is currently beginning to suffer the consequences of wrong fuel contamination will likely end up in increasing amounts of damage affecting the fuel system parts.
  3. Are you interested in assurance?
    Then get it drained. Regardless of contamination percentage, there is invariably some extent of risk connected with driving a Petrol motor on Petrol contaminated with the wrong fuel. Likely implications of driving a car on the wrong fuel include things like the engine refusing to start, running lumpy, decrease in power, degradation of the high-pressure pump, worn out or bunged injectors, etc. These are some of the most typical Diesel in Petrol signs or symptoms, and should you detect any of them then stop and have it drained asap.

Avoid having any general so-and-so to try to repair your vehicle. We are BMW experts and possess the certification and knowledge needed to make sure that you are back on the road with little hassle or trouble.

Put Diesel in a Petrol BMW

Accidentally put Diesel in a Petrol BMW? Or possibly even put contaminated fuel in your BMW 318Ci?

Contact us for Assistance & Recommendations

Call us and receive sincere guidance and sensible help for your exact circumstances

We show up and do the fuel drain

We can come to you to carry out the fuel retrieval & cleanse right there on scene

Once carried out You Get Going Again

Once we are done you are 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 authorities in the UK, boasting national service, for BMW motorists in particular. We mainly fix:

  • Unleaded petrol in Diesel Car
  • Diesel in an Unleaded Petrol Car
  • AdBlue fuel 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 can get you going once again.

The Procedure

The method of removing Diesel from a Petrol car is basically the same for most cars. As you can imagine it can differ slightly as each brand has their unique fuel system. Nevertheless it still 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 FAQs

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 assistance please Contact Us!
We can get you on the road 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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