LPG stands for liquefied petroleum gas, which is a mixture of propane and butane. At petrol stations in the UK, LPG is usually sold as Autogas and the mixture typically contains around 60% propane and 40% butane. The exact composition can vary depending on the supplier, but the proportion of propane is usually higher in colder months to ensure the fuel remains in a liquid state in low temperatures.
What Gas is LPG at a Petrol Station?