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Oil appears in the game as a black puddle shooting out black circles. It can appear in any terrain, including water.

Oil provides production and commerce to the city that works it. It is required for the production of many of the late-game military units.

Civilizations with cities where the Standard Ethanol corporation is present automatically receive one of this resource.

Civilopedia entry[]

Humans have known oil since ancient times. Oil deposits found on the surface were used for centuries for waterproofing and fuel purposes. But it was not until the coming of the Industrial Revolution that civilizations began to have a dependence on petroleum products. The widespread use of oil for fuel, lubrication, and other purposes has led to a constant search for ever larger deposits. In the mid-1800s, the first oil wells were drilled in Pennsylvania, marking the beginning of a tremendously important and profitable industry. Today, with the world's oil supplies dwindling and the demand for oil constantly rising, oil is a more valuable resource than ever.

Civilization IV Resources [edit]
Luxury Dye Fur Gems Gold Hit Movies Hit Musicals Hit Singles Incense Ivory Silk Silver Spices Sugar Whale Wine
Bonus Banana Clam Corn Cow Crab Deer Fish Pig Rice Sheep Wheat
Strategic Aluminum Coal Copper Horse Iron Marble Oil Stone Uranium