What Happens When You Put The Wrong Fuel in Your Car?

Here at Wrong Fuel we understand that any of us can put petrol in a diesel car; it is easily done. You can be distracted by your own family or be thinking about a problem and be absent minded for a few seconds, but that’s all it takes. It happens to more people than you think, so much so that it has acquired the name of misfueling.

Putting diesel petrol into your petrol car is a rare occurrence because the filler neck hole on an unleaded petrol car is much smaller than a diesel one. In addition to this you will notice that the consistency is different. Diesel smells different to petrol and it has a heavier consistency. Diesel in your petrol  engine will wet your spark plugs rendering them unable to spark. It is a good idea to get your car drained by professionals.

However, putting petrol in a diesel car is easier to do, and it can have dire consequences. Your car will not ignite and it can also break down your engine. Petrol wrecks a diesel engine’s lubrication, with burning petrol in diesel tanks acting as a solvent causing damage to the fuel injector and fuel pump.


What happens if you put petrol in a diesel car?

  • Don’t turn on the ignition or start the engine
  • If you’ve added more than 10% (5 litres in a 50 litre tank) petrol – the car shouldn’t be run and the tank should be drained
  • If you’ve added less than 10% of petrol then the tank can be topped up with diesel unless the manufacturer has advised otherwise
  • Act quickly

You can act quickly by getting in touch with us here at Wrong Fuel. We will come to you and take the contaminated fuel out of your vehicle in a safe and controlled manor, flushing the fuel system including the tank, lines, filter, fuel pump, and injectors. Once the contaminated fuel is removed we will check that your engine is running properly and dispose of the fuel in accordance with the environmental agency guidelines. It is worthwhile taking note of our number which is 0800 634 9827; you can’t be too careful by being prepared for these situations.