The misfuelling prevention device

Calculate your annual diesel and petrol bill

The Diesel Head Misfuel Prevention Device (standard and locking) has been engineered to prevent motorists mistakenly pumping petrol into their diesel cars and vans, known as misfuelling. The mistake can lead to sizeable bills, especially if the driver starts the engine and drives the vehicle having misfuelled, so save money and fit a Diesel Head. Meanwhile, one member of the media has come up with a calculator so that you can work out what your annual fuel – diesel or petrol – could be. Visit and see not only what the overall fuel bill might come to, but also how it is divided into duty, VAT and the cost of the fuel itself. There is also an option to see how the bill could change depending on whether the price of a litre of petrol or diesel goes up or down.