Petroleum, (from Greek πέτρα rock and έλαιο oil) also called crude oil, is a thick and black liquidIt is a natural material mainly made of hydrocarbonsMost petroleum is found by drilling down through rocks on land or offshore on the continental shelfMajor producers are in the Middle East, the Americas, and RussiaIt is the most important world fuel sourceDefine petroleum, oil, and lubricants petroleum, oil, and lubricants synonyms, petroleum, oil, and lubricants pronunciation, petroleum, oil, and lubricants translation, English dictionary definition of petroleum, oil, and lubricants A broad term that includes all petroleum and associated products used by the Armed Forces Also called POLCrude oil prices & gas price charts Oil price charts for Brent Crude, WTI & oil futures Energy news covering oil, petroleum, natural gas and investment advice How Is Plastic Made British Plastic Federation Petroleum oil msds