Warning issued to drivers filling up petrol at Tesco, Morrisons, Asda, and Sainsbury's

A motoring expert has shared how drivers can improve the of their vehicles by as much as 30 % by making a simple yet effective change.

Whilst the shocked many by for 2025, many motorists are still looking for ways to make their vehicles more economical to run.

Howard Cox, founder of the and campaign group , noted that making small changes to the way motorists use their cars and the location they fill up at can create a big difference.

He explained: "Up to 30 % lower fill-up costs can be achieved if common sense practical approaches are adhered to.

"Remove the boy racer from your psyche. Don't idle in traffic jams; switch off when stationery is in traffic."

Whilst it can be tempting for drivers to put their foot to the floor on quiet sections of the road, harsh acceleration and braking can significantly increase the amount of fuel a vehicle consumes.

Drivers looking to improve fuel consumption should accelerate gently and scan the road ahead for any scenarios that may require them to slow down and stop, smoothly applying the brakes well in advance.

In vehicles with a manual gearbox, drivers should also make sure they shift up a gear when the engine reaches 2,500rpm to get the very best fuel economy.

Howard also suggested that drivers carefully choose where they buy their fuel, with cheaper petrols and diesels offered by supermarkets often being more expensive in the long run.

He advised: "Regarding the fuel, use the best and most reputable brands with widely available additives that lower emissions and improve consumption."

Whilst supermarket fuels are often notably cheaper than average, many lack the additives and conditioners of premium alternatives that can help to clean the fuel system of deposits and run more efficiently in high-end models.