Pennzoil
Overview
Pennzoil is an American oil company founded in Los Angeles, California
Los Angeles, California
Los Angeles , with a population at the 2010 United States Census of 3,792,621, is the most populous city in California, USA and the second most populous in the United States, after New York City. It has an area of , and is located in Southern California...

 in 1913. In 1955, it was acquired by Oil City, Pennsylvania
Oil City, Pennsylvania
Oil City is a city in Venango County, Pennsylvania that is known in the initial exploration and development of the petroleum industry. After the first oil wells were drilled nearby in the 1850s, Oil City became central in the petroleum industry while hosting headquarters for the Pennzoil, Quaker...

 company South Penn Oil, a former branch of Standard Oil
Standard Oil
Standard Oil was a predominant American integrated oil producing, transporting, refining, and marketing company. Established in 1870 as a corporation in Ohio, it was the largest oil refiner in the world and operated as a major company trust and was one of the world's first and largest multinational...

. In 1963, South Penn Oil merged with Zapata Petroleum
Zapata Corporation
Zapata Corporation is a holding company based in Rochester, New York, and originating from an oil company started by a group including the former United States president George H. W. Bush. Various writers have alleged links between the company and the United States Central Intelligence Agency...

; the merged company took the Pennzoil name. During the 1970s, the company moved its offices to Houston, Texas
Texas
Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

. In 1977 a spin-off company was formed called Pogo, which stood for Pennzoil Offshore Gas Operators.

Pennzoil was headquartered in Pennzoil Place
Pennzoil Place
Pennzoil Place is a set of two 36-story towers in downtown Houston, Texas, United States. Designed by Philip Johnson and John Burgee and built in 1975, Pennzoil Place is Houston's most award-winning skyscraper and is widely known for its innovative design....

 in Downtown Houston
Downtown Houston
Downtown Houston is the largest business district of Houston, Texas, United States. Downtown Houston, the city's central business district, contains the headquarters of many prominent companies. There is an extensive network of pedestrian tunnels and skywalks connecting the buildings of the district...

 during the 1970s.
 
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