5 Things You Need to Do When You Put Petrol in a Diesel Car

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Are you one of those unfortunate souls who filled up the wrong tank on their car? Filling up the petrol tank of a diesel car is a common mistake, and it can be a real headache to fix. This blog will provide you with five essential steps to take when you put petrol in a diesel car.

1. Don’t Start the Engine

If you’ve put petrol in a diesel car, the most important thing to do is not to start the engine. Starting the engine can cause serious damage to your car, as petrol and diesel are incompatible substances.

If you’ve already started the engine, it’s important to get it checked by a qualified mechanic as soon as possible. Running a petrol engine on diesel can cause a number of problems, including engine damage, fuel system damage and emission control system damage.

2. Drain the Fuel Tank

The next step is to drain the fuel tank of your car. You can do this by taking the car to a qualified mechanic, who will be able to drain the tank and replace the fuel with the correct type. Of course, you need to take some precautions when doing this. First, make sure you’re wearing protective clothing, as gasoline is a hazardous substance. Second, use a fuel-safe container to catch the gas. And finally, be careful not to spill any gasoline, as it can be very flammable.

3. Clean the Fuel Lines

Once the tank is clean, you’ll need to flush the fuel lines. This can be done by disconnecting the lines from the engine and running a fuel-safe cleaning solution through them. This will remove any residue that may be in the lines and prevent it from causing damage to the engine.

It’s important to clean your fuel tank on a regular basis to prevent problems. If you notice that your fuel system is not operating as efficiently as it should, it’s a good idea to have it checked by a professional.

4. Replace the Filters

After the fuel lines have been cleaned, the next step is to replace the fuel filters. This is important, as the petrol in the fuel tank may have damaged the fuel filters. Replacing the filters will help to ensure that the engine runs smoothly and efficiently.

Fuel filters are relatively inexpensive and easy to replace, so it is a good idea to do this as soon as possible after the fuel lines have been cleaned. Be sure to follow the instructions in the owner’s manual when replacing the fuel filters.

5. Get the Car Serviced

Finally, it’s important to have the car serviced by a qualified mechanic. This will help to ensure that any damage caused by the wrong fuel has been repaired and that the engine is running correctly.


By following these five essential steps, you’ll be able to get your car back on the road quickly and safely. Be sure to always check the fuel type before filling up your car, and if you do make a mistake, take the necessary steps to fix it as soon as possible.

If you ever have the misfortune of putting the wrong fuel in your car, you’ll need help from fuel-draining companies to safely and effectively remove the wrong fuel from your vehicle. Fuel Fixer offers mobile units across the UK to help with misfuelling issues. If you need to remove petrol in a diesel car, contact us right away.

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