Put Petrol in a Diesel car?

Petrol in a Diesel Car

If you have put petrol in a diesel car, then you need to act quickly. Putting the wrong fuel into your vehicle can cause havoc to your journey and potentially cause extensive damage to your car engine.

It's a common mistake to make. On average, it happens every three minutes in the UK with roughly 150,000 motorists filling their tank with the wrong fuel every year. That includes putting diesel in a petrol car too - but putting petrol in a diesel is more serious.

If you put petrol in a diesel car, the most important thing to remember is not to try to start your car. Starting your engine will circulate the mixed fuel around your engine, which can cause more damage.

What to do if you’ve put Petrol in a Diesel Car

If you’ve already put the wrong fuel in your car and are looking for immediate assistance, RAC Fuel Drain services can help.

Call RAC Fuel Drain Patrol on: 0330 332 8456

RAC members receive a £50 discount off the full price.


Remember - do not switch on your ignition. You want to make sure that the fuel is drained so that you can be on your way.

If you need our Wrong Fuel Recovery Service, call us on 0330 332 8456 so that we can come and drain the fuel and flush your engine.

What Happens if You Put Petrol in a Diesel Car?

Putting petrol in your diesel car may damage your fuel system if not dealt with properly. When you put petrol fuel in, the mix of petrol in diesel acts as a solvent, reducing lubrication and causing damage to the pump as the metal parts come into contact and rub together. Other parts of the fuel system which might not be compatible with petrol, can also be damaged.

Switching on your car’s ignition will circulate this mix of petrol in diesel through your fuel system, causing further contamination to other components.

Ultimately, this could mean that the entire fuel system requires costly repairs, or replacing completely.

Call the RAC Fuel Patrol on 0330 332 8456.

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