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What to do if you fill up your car with the wrong fuel?

What to do if you fill up your car with the wrong fuel?

In either case, if you realise you have filled up with the wrong fuel, do not start the engine. The severity of the problem will depend on how much incorrect fuel you have put in the tank – and whether you’ve put petrol in a diesel car or diesel in a petrol car.

What to do if you put petrol into a diesel vehicle?

The mechanic must also confirm the petrol has not returned from the high-pressure fuel system. Once confirmed, petrol can be removed and cleaned from the tank and lines, the fuel filter replaced, and the vehicle refilled with diesel. This can take several hours so you will incur some costs.

Do you need to drain your diesel fuel tank?

In fact, if you have not put much petrol in your diesel tank (under 5%) you might even get away with running the car and not need a your fuel tank draining. Our professional advice, however, is always to have the contaminated fuel removed from your car as soon as possible for complete peace of mind as you don’t want any complications down the line.

Can you put 5 percent petrol in a diesel tank?

If you’ve added a small amount of petrol to a diesel tank, you could get away with filling the rest of the tank with diesel. That’s because a mix of 5 percent petrol and 95 percent diesel is unlikely to damage the fuel system and engine.

What to do if you put Diesel in a petrol car?

It is essential to carry out a full fuel drain. Once the contaminated fuel has been removed and the tank filled with the correct diesel there should be no damage to the engine. Already driven the car before realising?

In either case, if you realise you have filled up with the wrong fuel, do not start the engine. The severity of the problem will depend on how much incorrect fuel you have put in the tank – and whether you’ve put petrol in a diesel car or diesel in a petrol car.

What happens if you put diesel fuel in a gas tank?

If you had a gas tank full of diesel fuel, the fuel injectors in your engine would inject the diesel fuel into the engine’s cylinders. The spark plugs would fire, but nothing would happen after that. Because the diesel fuel doesn’t evaporate very well, the spark plugs would have nothing to ignite, and the engine would never start.

If you’ve added a small amount of petrol to a diesel tank, you could get away with filling the rest of the tank with diesel. That’s because a mix of 5 percent petrol and 95 percent diesel is unlikely to damage the fuel system and engine.

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Ruth Doyle