The Pan American Petroleum and Transport Company (PAT) was an oil company founded in 1916 by the American oil tycoon Edward L. Doheny after he had made a huge oil strike in Mexico. Pan American profited from fuel demand during World War I, and from the subsequent growth in use of automobiles. For several years Pan American was the largest American oil company, with holdings in the United States, Mexico, Colombia and Venezuela. In 1924 Pan American was involved in the Teapot Dome scandal over irregularities in the award of a U.S. government oil concession. Standard Oil of Indiana obtained a majority stake in 1925. The company sold its foreign properties to Standard Oil of New Jersey in 1932. What was left of Pan American was merged with Standard Oil of Indiana in 1954 to form Amoco.

Edward Laurence Doheny was an American oil tycoon who, in 1892, drilled the first successful oil well in the Los Angeles City Oil Field. His success set off a petroleum boom in Southern California, and made him a fortune when, in 1902, he sold his properties.