What is misfuelling? Misfuelling is simply putting the wrong type of fuel in your car or van. So if you put petrol in a diesel car – that's misfuelling. You might be thinking that it's just not possible to put the wrong fuel in your vehicle these days. IT IS!! The nozzle on a diesel pump is bigger and therefore won't fit in the neck of a petrol tank smoothly. However, it's much easier to accidentally put petrol in a diesel vehicle. The petrol nozzle is smaller and fits into the diesel tank easily. It's only when you realise you're holding a green pump not a black one that the penny drops. Diesel Head prevents misfuelling! Stops you putting petrol in your diesel car or van. Around 150,000 UK drivers of cars and vans put the wrong fuel every year. Report dated 10 Apr 2022 Here are the fitting instructions for the Diesel Head Mis Fuelling Prevention Product aide automotive Our product range – #HGV #Brake Testers – 24 Volt #Trailer Light #Testers – 12 Volt Trailer / #Caravan Light Tester -#EBS / #ABS Sensor #Wheel Tester – #Truck #Diagnostic Tools – 24 Volt #Midtronics #Battery Testers – #Fuel #Tank Anti #Siphon Devices – Truck #Fifth #Wheel Lube Liner – Trailer #Susie #Locks – #Vehicle Auto #Braking Reversing System – #HGV Tank Protection – Plus More