A new misfuelling device that stops the wrong type of fuel being added to diesel cars and light commercial vehicles has been launched by Caparo.

The repair bills for diesel cars that have petrol put into the fuel tank can range from £150 - £300 to drain the tank to several thousand pounds if the engine runs with the wrong fuel.

Petrol pumps use a smaller diameter nozzle than those used on diesel fuel pumps, meaning they can be inserted in both petrol and diesel cars.

Rightfuel replaces a vehicle’s existing fuel filler cap and will not open unless the correct size nozzle from a diesel fuel pump engages it.