LPG - Liquefied Gas is used to power IC engine vehicles. The LPG canisters are normally exchanged on forklift trucks. Refill stations generally fill LPG canisters from larger storage tanks under where the liquid gas is stored under pressure and directed towards the empty bottle. Note that LPG & air is a flammable and potentially explosive mixture. Avoid use of LPG in confined areas such as basements or areas with open shafts or around open flames.