Inside a maze of silver towers and pipes is a fascinating factory that changes hydrocarbon molecules to make gasoline.

A refinery is a factory. Just as a paper mill turns lumber into legal pads or a glassworks turns silica into stemware, a refinery takes a raw material–crude oil–and transforms it into gasoline and hundreds of other useful products.

A typical large refinery costs billions of dollars to build and millions more to maintain and upgrade.

It runs around the clock 365 days a year, employs between 1,000 and 2,000 people and occupies

as much land as several hundred football fields. It’s so big and sprawling, in fact, that workers ride bicycles from one station to another.

Chevron has six gasoline-producing “Factories” in the United States and another in Burnaby, British Columbia. ChevronTexaco has refining capacities worldwide of over two million barrels per day, with 21 refineries around the world.

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