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.

But don’t worry, it’s a common mistake to make, occurring on average every 3 minutes in the UK with roughly 150,000 motorists filling their tank with the wrong fuel every year. So you’re not alone!

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, the RAC can help.

Remember - do not switch on your ignition. You want to make sure that the fuel is drained as quickly as possible 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 will damage your fuel pump if not dealt with immediately. In diesel cars, the main fuel pump uses the diesel fuel flowing through it for lubrication. However, when you put petrol fuel in, the mix of petrol in diesel acts as a solvent, reducing lubrication and quickly 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, if left for too long this could mean that the entire fuel system requires costly repairs, or replacing completely!  

Call the RAC Fuel Patrol on 0330 332 8456.