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What To Do If You Put the Wrong Fuel in Your Car

Putting the wrong fuel in your vehicle is a common mistake and happens to drivers of all experience levels. Acting quickly and correctly can prevent serious engine damage and unnecessary costs.

Wrong Fuel UK provides a 24 hour mobile fuel drain and fuel system cleaning service across the South West, helping drivers get back on the road safely and efficiently.

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Immediate Steps If You’ve Used the Wrong Fuel

If you realise you have put petrol in a diesel vehicle or diesel in a petrol vehicle, follow these steps:

1. Do not start the engine

Starting the engine allows contaminated fuel to circulate through the fuel system. This can damage fuel pumps, injectors and common rail components, especially on modern vehicles.

2. If the engine is already running, stop safely

Pull over as soon as it is safe to do so and switch the engine off. The less the vehicle runs, the lower the risk of damage.

3. Contact a specialist fuel drain service

A professional mobile fuel drain service can remove the contaminated fuel safely without the need for vehicle recovery or garage delays.

4. Do not attempt to dilute the fuel

Adding the correct fuel does not solve the problem and can increase the risk of fuel system damage.

What Happens If You Drive on the Wrong Fuel

Using the wrong fuel can affect vehicles in different ways depending on engine type:

Petrol in a Diesel Engine

Petrol acts as a solvent in diesel engines, reducing lubrication within the fuel pump. This can cause metal-to-metal contact, wear and the release of metal particles. These particles may then travel through the fuel system, potentially damaging injectors, the common rail and the high-pressure fuel pump.

Modern diesel engines, including HDI and common rail systems, are particularly sensitive to contamination.

Diesel in a Petrol Engine

Diesel fuel does not ignite properly in petrol engines and can cause poor combustion, misfiring and stalling. While usually less damaging than petrol in a diesel engine, it still requires professional removal to avoid further issues.

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How Wrong Fuel UK Resolves the Problem

Wrong Fuel UK specialises in mobile fuel drainage and fuel system cleaning. Our process is designed to minimise risk and get your vehicle running safely again:

  • Drain all contaminated fuel from the tank

  • Flush the fuel system to remove residue and debris

  • Clean fuel lines, fuel pump and affected components

  • Refill with the correct fuel

  • Prime the system and restart the vehicle

  • Test and check the vehicle before leaving you to continue your journey

Where required, we can also carry out advanced engine and fuel system cleaning treatments.

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South West Coverage Area

Wrong Fuel UK operates a 24-hour mobile service across the South West of the UK, including:

Plymouth, Exeter, Truro, Bodmin, Newton Abbot, Saltash, Ivybridge, Tavistock, Newquay, Paignton, Redruth, Falmouth, Bude, Wadebridge and surrounding areas.

If you are stranded at a petrol station, roadside, home or workplace, our technicians can attend your location.

👉 Check all areas covered

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Trusted Specialists With Proven Experience

With over 20 years of experience, Wrong Fuel UK is a trusted specialist in wrong fuel recovery and fuel system cleaning.

We are:

  • Environment Agency certified

  • SPA approved

  • ATEX compliant

  • ACS registered

Our technicians are trained to deal with petrol and diesel contamination safely, professionally and efficiently.

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Trusted by Drivers Across the South West

Drivers across Devon and Cornwall rely on Wrong Fuel UK for fast response times, professional service and clear communication during stressful situations.

“Very impressive service, quick response and extremely efficient. The technicians were kind, professional and had me back on the road in under an hour.”
Land Rover Freelander – Saltash

“Wrong Fuel UK arrived quickly, fixed my mistake and explained everything clearly. Much faster and cheaper than my breakdown service.”
Mercedes C220 – Plymouth

“Fantastic service by friendly people. Highly recommended.”
Peugeot 307 – St Newlyn East

“Professional, reassuring and efficient. I was back on the road within 90 minutes.”
Vauxhall Astra – Plymouth

“Quick, polite and very reasonably priced. Excellent service.”
VW Golf – Ivybridge

👉 Read more verified customer reviews

24 Hour Assistance When You Need It

If you have put the wrong fuel in your vehicle and require assistance, Wrong Fuel UK operates 24 hours a day, 7 days a week across the South West.

​Our mobile service allows us to attend your location and resolve the issue without unnecessary recovery or garage delays.

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