Petrol in Diesel Tank - Fuel Flush & Repairs in Hamilton | Grimmer Motors
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Petrol in Diesel Tank – Fuel Flush in Hamilton

What happens when you put petrol in a diesel vehicle?

Putting petrol in a diesel vehicle can damage the fuel system and the diesel engine. Therefore, it is important to stop driving as soon as you notice the mistake. When the car starts, the petrol will have already mixed with diesel fuel in the tank and it is then distributed through your vehicle’s fuel system, including the diesel engine fuel pump. This means that some of the damage can be done almost immediately so it is important not to drive the car to far (ideally do not even start the engine). 

Petrol will strip the diesel fuel pump of its lubrication, resulting in parts rubbing together and quickly deteriorating. This produces small metal filings which can clog your fuel system and damage your fuel injectors.

When petrol enters a diesel vehicle, you may notice the following symptoms (while driving):

  • Engine running rough
  • Engine struggling to accelerate
  • Increased smoke from the exhaust
  • Engine struggling to start
  • Knocking or unusual noises from you diesel motor


What to do?

If you ever find yourself in this situation, you should immediately stop driving your vehicle. The longer your car’s engine is running, the more damage will be done. As the petrol enters your diesel engine fuel pump and diesel fuel injectors, it can cause serious damage.

If you suddenly notice that you’ve added the wrong fuel to your vehicle, we recommend that you do not start the car, but if you do, pull over as soon as you can and arrange for the towing of your vehicle. The price of towing will cost much less than the price of repairs to your engine (if petrol is left mixed with the diesel in your fuel tank).

Learn more about what to do >


Petrol out of diesel fuel tank draining and repairs in Hamilton

It is important that petrol is drained from your car’s diesel fuel system before it causes major damage. At Grimmer Motors, we can drain the petrol from your diesel vehicle fuel tank. This will prevent further damage to your car’s fuel system and engine. We also offer repairs for fuel pumps/injectors and engines that have been damaged by petrol in diesel fuel tanks.

For fast, quality and effective fuel draining solutions in Hamilton, contact Grimmer Motors today!




Phone: 07 855 2037

Address: 998 Heaphy Terrace, Fairfield, Hamilton

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