Bad fuel in your BMW 530i? Diesel in a Petrol BMW?

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BMW Fuel Drain


Filling Diesel in a Petrol BMW is a usual mistake to make. And its solution is determined by a number of factors. If perhaps you want to know what you have to do about this then read on.
Listed here are the main factors to think about whenever choosing whether or not to have the car drained:

  1. How much Diesel did you put into the BMW, taking into account that the fuel capacity of the BMW 530i is usually about 70 litres?
    1. A tiny amount of Diesel, something like 3.5 litres of Diesel in a Petrol 530i will more often than not not necessarily be a big problem. Experience has demonstrated to us that an amount under 3.5 litres (which is almost 5% of the overall fuel tank capacity) is very often able to be completely diluted simply by wholly filling the rest of the tank with Petrol.
      It's highly uncommon to encounter a car going through issues due to lower than 5% wrong fuel contamination. Please remember it is very uncommon - in no way impossible to encounter. You can get certain vehicles that won't stand any level of fuel contamination in the slightest.
    2. Somewhere between 3.5 and 7 litres of Diesel in the BMW (from 5 to 10%) is really a 50/50 situation. Our practical experience has shown us that as many motorists get away with this as those people who don't. Any time you're trying to decide whether or not to chance it and just simply top it up bear in mind that it is much like betting everything on black - you have got a 50/50 chance of it being ok.
    3. Anything in excess of 7 litres of Diesel in your Petrol 530i should as soon as possible be drained as your probability of driving with this quantity of contamination is in all likelihood less than one in 50 - definitely huge odds.
  2. Put Diesel in a Petrol BMW and drove it: Have you spotted any kind of performance issues as a result of putting the bad fuel in your 530i? If you have, get it drained no matter the volume of Diesel or the contamination ratio. Proceeding to run driving a motor vehicle that is beginning to suffer the effect of fuel contamination will only lead to increasing amounts of damage being caused to your fuel system.
  3. Are you interested in security?
    Simply get it removed. No matter the contamination ratio, there is always some extent of risk in connection with running a Petrol motor on Petrol contaminated with Diesel. Likely final outcomes of driving a vehicle on the wrong fuel include the engine refusing to start, running lumpy, decrease in power, degradation of the high-pressure pump, damaged or clogged injectors, etc. These are several of the most typical Diesel in Petrol warning signs, and should you recognise any of them stop driving and have it removed immediately.

Don't just have any untrained so-and-so to try to repair your vehicle. We are BMW specialists and hold the accreditation and knowledge necessary to ensure you are back on the road with minimal hassle or worry.

Put Diesel in a Petrol BMW

Mistakenly put Diesel in a Petrol BMW? Or even put contaminated fuel in your BMW 530i?

Call us for Assistance & Guidance

Contact us and receive sincere guidance and sensible help for your particular circumstances

We show up and do a fuel drain

We are able to reach you to perform the fuel retrieval & flush there on scene

Once performed You Get Going Again

As soon as we are done you should be able to get back moving and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain experts in the UK, offering nationwide service, for BMW motorists especially. We primarily fix:

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

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

The Procedure

The method of getting rid of Diesel from a Petrol vehicle is fundamentally exactly the same for the vast majority of vehicle makes. Obviously it can vary slightly as every brand has their particular different fuel system. Having said that it still basically 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 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.

Contact Us

Should you have any queries or need assistance please Contact Us!
We are able to get you going once again.

24/7 BMW Helpline

0333 366 0103

Our Corporate Office

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

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