Misfuelling can usually be resolved if you follow the right steps.
What to do if you put the wrong fuel in your car
First things first: do not start your engine. If you turn your engine on, it will circulate the wrong fuel and damage your vehicle’s fuel system.
Here’s what you should do instead:
- Get your car to a safe spot, if you can
- Or tell a petrol station staff member, so they can put cones around your car
Contact RAC breakdown support
You’re covered for breakdowns on the Motability Scheme, as part of your all-inclusive package.
The RAC will help get you moving again. They’ll safely drain and flush your car’s fuel system.
How to report your breakdown:
- Use the myRAC app(opens in a new window). It’s quick and easy
- Report it online(opens in a new window)
- Call 0800 73 111 73
What to do if you’ve already driven away
It’s natural to only realise you’ve made a mistake after you’ve already driven off.
Here’s what to do:
- Stop somewhere safe
- Turn off your engine
- Contact the RAC
Listen and look for symptoms: if you hear unusual noises or notice a loss of power, these are signs the wrong fuel has already damaged your car.
What happens if you put the wrong fuel in your car
This depends on which fuel you used:
Petrol in your diesel car
- If you start your car, you’re removing the lubrication a diesel car needs
- Metal parts can grind together and damage the fuel system
- You’ll need major repairs or a new engine
Diesel in your petrol car
- If you start your car, you’ll clog your spark plugs and fuel system
- Your tank will need to be drained
- Your whole fuel system will need a good clean
Will it damage your vehicle?
If you start your car
It’s very likely the wrong fuel will cause severe damage as it circulates your car’s fuel system. You’ll need major repairs and possibly a new engine.
If you do not start your car
There’s usually no significant or permanent damage. The incorrect fuel stays in your fuel tank, which makes it much easier for an RAC mechanic to drain and flush your system.
How to stop misfuelling
Here are a few practical tips to save you from misfuelling in the future:
- Double check the pumps: get in the habit of looking them over twice, before you pick anything up
- Look at the label: once it’s in your hand, check it again. Does the fuel match the car you’re driving today?
- Write a reminder for yourself: stick this inside your fuel door or cap and you’ll see it every time you top up
Some cars do the hard work for you: Certain vehicles clearly show which fuel you should use on their fuel door, like in the image below. This makes things easy when you’re unsure.
It’s a common mistake, so if it happens to you again, just remember: never start your engine, and contact the RAC.
Want more useful car tips?
Knowing more about your car can save you time and extra costs.
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Image credits: Shutterstock
