Free crude oil trading video at <br />http://www.ino.com/info/37/CD3752/&dp=0&l=0&campaignid=9 <br /><br />=== <br />SP500 Trading http://www.spxfactor.com/ <br />=== <br /><br />Petroleum (L. petroleum, from Greek πετρέλαιον, lit. "rock oil") or crude oil is a naturally occurring, flammable liquid consisting of a complex mixture of hydrocarbons of various molecular weights, and other organic compounds, that are found in geologic formations beneath the earth's surface.
