It would be simply amazing to have a magic button in your car that saves you money - and it turns out this could be a little closer to reality than you might think.
Thanks to one useful fuel-saving hack taking the internet by storm, it's actually possible to save extra fuel by pressing this little-known button.
One motorist has explained exactly what the button - featuring the a car with an arrow inside as its symbol - is actually for.
The hack - which also has the backing of an AA spokesperson - was shared by TikTok star "Megan's Bubble" who explained that the button is for air recirculation, The Mirror reports.
And it turns out the button - which several commenters did not know how to use - is very important.
@megansbubble amazed drivers when she shared trick in a video, with the onscreen caption: "Car tips and tricks. I bet you didn't know what this car button is actually used for."
Megan explains: "Essentially what it's going to do for you, it means that you are recirculating the air inside the car.
"So if it's extraordinarily hot inside of your car when you first get in you want to turn this off so that you suck in the outside air.
"If you're sitting in front of other cars where you'll be getting all the exhaust fumes sucked into your car, you use this button so that the air inside your car recirculates and you don't suck in all that bad air."
And not knowing about the button could be hiking up your bills, as confirmed by AA spokesperson, Luke Bosdet.
"If you don’t know what the recirculation button does and have been blasting the air con to try to cool passengers on the back seat, you’ve been missing a trick and paying for it," warns Mr Bosdet.
Rather, it is best to turn the AC off after a few minutes and use the button to keep cool air trapped inside the car.
Of course, the cheapest way to stay cool while keeping your fuel consumption down is to switch off air conditioning and wind down the windows, when travelling at lower speeds.
But AC might be the best bet for higher speeds, as your car will be more likely to experience drag, causing your car to work harder.
Whichever option you choose, you should be aware air conditioning uses more energy, which is why it impacts your fuel.
But its not all bad news, as Mr Bosdet points out: "It is possible on longer trips and faster roads that the air vents will generate enough air flow for the car to remain comfortable after the air con has done its initial job and can be switched off."
