The easiest way to find the cheapest forecourt in your area for petrol, diesel and LPG (plus more) is by using the free website Petrolprices.com. Just register, enter your postcode & tell it how far you’re willing to travel (2, 5, 10 or 20 miles) and it’ll list today’s cheapest petrol stations in your area for unleaded, diesel, LPG and other fuels. A quick check before you need to fill up should be enough to save you serious cash.