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Misfuelling & Wrong-fuel

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So you have put the wrong fuel in your car, what now?

You’re not alone, it’s estimated that at least 150,000 drivers put the wrong fuel in their car each year – one every three and a half minutes!

BMS misfuel service:

We at BMS specialise in fuel retrieving and have a very rapid response to call outs. We use specialist tooling to drain contaminated fuel, add the appropriate fuel and ensure your vehicle is back on the road as soon as possible.

We hold the appropriate waste carriers licence and ensure all contaminated fuel is collected by a waste management company.

Misfuelling -Useful information:

If you’ve put the wrong fuel in your car, don’t turn on the ignition or start the engine as this will circulate the contaminated fuel and increase the risk of damage.

Potential damage

Diesel fuel pumps operate on very fine tolerances and are lubricated by the diesel fuel itself.

Petrol in diesel acts as a solvent – it reduces lubrication and can cause damage to the pump through metal to metal contact.

Some fuel system seals can be affected by the compounds in petrol too.

The further the contaminated petrol goes in the system the more expensive the repair – it can be cheaper in more extreme cases to fit a new engine.

Many systems use a low-pressure electric pump in the tank or sender unit and this begins to work as soon as the ignition is switched on, circulating the contaminated fuel through the pump and rail – so it’s important not to turn the ignition on.

Petrol in Diesel

Do not turn on the ignition or start the car

Generally a small amount of incorrect fuel should not damage the engine as long as you have not started the car and top up fully with diesel fuel.

Diesel in Petrol

Do not turn on the ignition or start the car

This is much less common because the standard diesel nozzle at fuel stations is larger than the fuel filler neck on modern petrol cars – you have to be pretty determined and patient to misfuel with diesel as a result.

If the car’s still under warranty you should check with the franchised dealer regarding their advice and correct remedial action.

Generally a small amount of incorrect fuel should not damage the engine as long as you have not started the car top up fully with petrol.

If you’ve added more than 10% (5 litres in a 50 litre tank) diesel – the car shouldn’t be run and the tank should be drained
If you’ve added less than 10% (5 litres in a 50 litre tank) diesel – the tank can be topped up with petrol and the car run normally unless the manufacturer has advised otherwise

Customer Reviews

  • Fantastic quick service. Needed an MOT with very short notice, Tim was exceptionally helpful and supported me through the whole process. Would recommend to anyone. - Facebook Review: 5 stars.
    Fraser Duncumb | October 2017 | 2017-10-18
  • Totally Trust and would 100% recommend BMS Cars. The staff are always happy and friendly. They have been looking after my car for 9 years. Routine servicing, MOT and any other work the car may require. They explain what needs to be routinely replaced, advise what is wearing out and will need to be replaced. I know what is itemised on my bill is accurate, and has been done. Thank you to Dan and the team. - Google Review: 5 stars.
    Louise | September 2017 | 2017-10-18
  • Brilliant! After being mucked around by other firms, BMS were quick, efficient and professional. Everything was quick and easy, the guys on the phone were a pleasure to deal with, and all it took was a couple of phone calls/emails. The price quoted was the price paid. The car was collected within two working days. Even the collection was impressive, with the driver ringing ahead of the arranged time, and going through the paperwork and loading the car in ten minutes. I would definitely recommend BMS and use them again. - Google Review: 5 stars.
    Stephen Brown | September 2017 | 2017-10-18
  • Use them very regularly really friendly guys and very knowledgeable! - Google Review: 5 stars.
    Louis Davis | August 2017 | 2017-10-18
  • BMS cars are a very professional and friendly company. I would have no hesitations in highly recommending them. - Google Review: 5 stars.
    Richard O'Brien | August 2017 | 2017-10-18
  • Cracking company, professional and polite staff, recommend. - Facebook Review: 5 stars.
    Ben Evans-Starr | August 2017 | 2017-10-18
  • Can absolutely recommend these guys to anyone. - Facebook Review: 5 stars.
    Tony Ward | August 2017 | 2017-10-18
  • Excellent service. Car was picked up and dropped off on the same day. Highly recommend. - Facebook Review: 5 stars.
    Aidan Hickman | July 2017 | 2017-10-18
  • Excellent service. I had bought a BMW which had a few minor and a couple of larger problems which you wouldn't have noticed when buying the car. Was happy to repair everything, kept me updated and supplied a courtesy car throughout the process. I would definitely buy again from them. Martin was the salesman who helped me though the sale but all the staff I met were friendly and happy to help. - Google Review: 5 stars.
    Tom S | June 2017 | 2017-10-18
  • Brilliant garage! Wouldn't go anywhere else . Worked hard to find right parts and passed on discounts. Really pleased I've found a great garage who I trust! - Facebook Review: 5 stars.
    Alison Johnson | May 2017 | 2017-10-18
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