Drivers told mistake 'adds extra £10 cost' to journeys

NewsUK NewsMotorsIt's easily fixed, an expert said08:50, 17 Aug 2026Updated 08:58, 17 Aug 2026Drivers heading away over the August bank holiday are being warned to remove forgotten roof boxes before setting off, as the accessory could increase fuel use by up to 25% at a time when pump prices are already climbing, according to an expert. The latest government figures put average petrol at 162.15p per litre and diesel at 181.97p, meaning a 55-litre fill costs around £89 for petrol and £100 for diesel.‌For a journey that would normally use £40 of fuel, a 25% increase in consumption could add around £10 to the cost, simply from leaving a roof box fitted.‌Paul Gorry, vehicle expert at luxury motorhome manufacturer Auto-Trail, said: “Bank holiday journeys often mean a car is already carrying mor