Contaminated fuel in your BMW 730i? Diesel in your Petrol BMW?

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BMW Fuel Drain


Putting Diesel in a Petrol BMW is a very common mistake to make. And what you want to do about it will depend on an assortment of factors. If perhaps you would like to know what to do to sort it out then keep on reading.
Listed here are the most important variables to take into consideration when figuring out whether or not to get a fuel drain:

  1. What amount of Diesel did you put in to the BMW, bearing in mind that the fuel capacity of your BMW 730i is most likely roughly 88 litres?
    1. A tiny amount of Diesel, as little as 4.4 litres of Diesel in a Petrol 730i will most of the time not be a massive problem. Experience has proven to us that an amount less than 4.4 litres (close to 5% of the whole fuel tank volume) is quite often capable of being sufficiently diluted through totally filling up the tank with the right fuel.
      It is highly uncommon to find a car having problems with under 5% incorrect fuel contamination. Keep in mind it is uncommon - in no way impossible to find. There are actually a number of cars that will not endure any quantity of fuel contamination whatsoever.
    2. In between 4.4 and 8.8 litres of Diesel in the BMW (from 5 to 10%) is really a 50/50 situation. Our working experience has demonstrated that as many drivers get away with this as those who break down. Whenever deciding whether or not to risk it and just simply fill it up bear in mind that it is very much like betting all of it on black - you've got a 50/50 chance of it being ok.
    3. Anything over 8.8 litres of Diesel in a Petrol 730i really should straight away be drained out seeing as your probability of driving with that amount of contamination is in all likelihood below one in fifty - genuinely long odds.
  2. Put some Diesel in a Petrol BMW and drove it: Have you spotted any kind of performance problems after putting the incorrect fuel in the 730i? If you have, get it removed irrespective of the quantity of Diesel or even the contamination ratio. Continually driving a vehicle that is beginning to suffer the effect of fuel contamination will probably definitely be responsible for increasing amounts of damage being caused to your fuel system parts.
  3. Are you interested in peace of mind?
    Then simply just get it removed. Whatever the contamination ratio, there is always a certain level of risk connected with running a Petrol vehicle on fuel contaminated with Diesel. Possible final outcomes of driving a vehicle on the wrong fuel include things like the engine not starting, running lumpy, reduced power, wearing of the high-pressure pump, worn or blocked injectors, and so on. These are some of the most common Diesel in Petrol signs or symptoms, and if you recognise any of them stop driving and get it drained as soon as possible.

Don't simply have any jack-of-all-trades to try to repair your vehicle. We are BMW experts and have the certification and expertise required to make certain that you are back on the road with no hassle or worry.

Put Diesel in a Petrol BMW

Accidentally put Diesel in a Petrol BMW? Or possibly even put contaminated fuel in your BMW 730i?

Contact us for Assistance & Advice

Call us and get sincere recommendations and practical assistance for your precise situation

We come out and drain it

We would reach you to undertake the full fuel removal & flush there on scene

All done & You Get Going Once again

When we have completed you can get back on your way and get on with your day

Wrong Fuel Drain Specialists

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

  • Unleaded petrol in a Diesel Vehicle
  • Diesel in Unleaded Petrol Vehicle
  • AdBlue contamination
  • Water contamination

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

The Procedure

The process of getting rid of Diesel from a Petrol vehicle is in essence similar for a large number of cars. As you can imagine it does vary to some extent as every brand has their own fuel system. However 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.

Contact Us

Should you have any queries or require some assistance please Contact Us!
We are able to 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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