What to do if you Fill your Vehicle With the Wrong Type of Fuel

Have you just put the wrong fuel in your car? Was it petrol in a diesel car or diesel in a petrol car? This blog will help you with what to do next after you have filled your car’s fuel tank with the wrong fuel. This common mistake happens more than you think, once every 4 minutes to be exact! So, don’t worry, you’re not the only person to fill their vehicle with the wrong fuel. If you have placed less that 5% of your full tanks capacity, then it will be safe for you to fill the rest of the vehicle up with the correct fuel and to then continue your journey.

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This is because adding a very small amount if the wrong fuel will not cause damage if it is diluted as much as possible. However, if you go over that 5% threshold then the whole tank will need to be drained to prevent damage from occurring. Depending on how much of the wrong fuel you have in your car and the amount of the correct fuel you already had in the fuel tank will determine how much damage will be caused to the engine, if there is a 50/50 mixture the vehicle may run and will cause damage while doing so, however if you have more of the wrong fuel than the correct fuel more than likely the vehicle will shut off before any considerable damage is caused. If you are unsure on the ratio it is advised that you get the tank drained and engine bay flushed as soon as possible to prevent damage.

Remember, most fuel tanks hold no more than 60 litres of fuel so you will only be able to safely dilute 3 liters as a maximum, any more than this and the whole tank will need draining, no matter if you have tried to dilute it down.

Adding the wrong fuel to a car can cause major damage to the engine and fuel system components, this can result in repair bills costing thousands of pounds to correct. The safest thing to do is to call a mobile fuel drain service to come and drain the contaminated fuel from your tank and engine as soon as you realize what you have done. Attempting to complete your journey on the wrong fuel will only result in more damage being caused to the engine or fuel system components resulting in costly repair bills. A mobile fuel drain takes on average 30 minutes to complete, so it really is not worth the risk for 30 minutes extra of your time.

Hopefully this guide will help you if you put the wrong fuel in your car and are unsure of what to do. Remember if you’re unsure then get the vehicle drained as a precaution, as this will be far cheaper than a wrecked engine.

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