DRIVERS could save themselves hundreds of pounds by hitting a hidden button inside their car while driving.
Experts reveal how the cheeky hack could preserve an extra "five per cent fuel" for motorists by maximising fuel efficiency.
And in a time where fuel prices continue to rise alongside the cost of living, it could be a lifesaver for Brits.
Experts at CarShop claim that switching your car into eco-mode will help you to save the pennies on future trips, the Birmingham Mail report.
“Most modern cars are fitted with an ‘eco mode’ that reduces throttle responsiveness and engine power output, in turn using less fuel," they said.
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"On automatic cars, it will also shift up earlier to keep the vehicle in the most economical gear which is calculated from the engine load.
"By using this mode you can save around five percent of fuel.”
Eco mode can be switched on and off by simply pressing a button that you can find near the steering wheel.
However, only modern-day models of fuel-operated and hybrid vehicles will have this feature.
Older models, as well as electric cars because they don't run on gas, won't.
Eco mode still makes the car use fuel, however, just less of it.
According to experts, the best time to switch your cart into eco mode is when you're travelling at lower speeds.
Anything under 45mph is the ideal time to use the snazzy feature, road and traffic experts revealed on CarShop's website.
Motorists can also slash their fuel use and pocket hundreds of pounds by pushing another key button in their car.
The feature helps to "reduce speeds" - meaning drivers will spend less time filling up at service stations.
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Experts at Motor Match have also stepped forward to share their practical, easy-to-implement hacks and tips to help motorists reduce their fuel consumption.
The experts say that one effective method is to keep driving in the highest possible gear, while remaining within the speed limit.