Using 20p can reduce petrol cost in SECONDS - whether you top up at ASDA, Tesco, Morrisons, Shell, Sainsbury's or BP

Over the last few months, petrol prices have skyrocketed. At one point petrol was selling for an average of 191.55p a litre, while diesel was costing a whopping 199.22p.

As such, drivers are looking for ways to reduce the amount they're spending on petrol. It could be easier than you think.

But experts say drivers can monitor their fuel economy and cut their fuel consumption, simply by checking their tyres with a 20p coin. According to Kwik Fit, using underinflated or unsuitable tyres can add 20% to a car’s fuel consumption.

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The tip will work no matter where you top up. Whether it be ASDA, Tesco, Morrisons, Shell, Sainsbury's or BP, it's worth trying, say experts.

Tyres typically lose air naturally, at a rate of up to two PSI (pounds per square inch) every month. Because of this, drivers are urged to check their tyre pressure regularly, as it can help preserve fuel. Ensuring tyres are topped up not only prolongs the life of the tread, but also improves fuel efficiency as there is less rolling resistance on the road.

If your tyres are even slightly distorted due to incorrect tyre pressure, drivers will be using more fuel to keep their cars running smoothly. This is because of the added friction while driving that comes from a misshapen tyre.

Drivers can check their tyre treads very easily with a 20p coin, the Express reports. Current UK law states that tyre tread on cars must be a minimum of 1.6mm across the central three-quarters of the tread, around its entire circumference.

Drivers should place a 20p coin into the main tread grooves of the tyre. If the outer band of the 20p coin is obscured when it is inserted, then the tread is above