Quaker State

Quaker State
Formerly	Quaker State Oil Production Company (1924–1931); Quaker State Corporation (1931–1990); Quaker State Oil Production Corporation (1990–1998); Pennzoil and Quaker State (1998–2002);
Company type	Brand of Phinny Brothers Oil Company (1912–1924); Private (1924–1998); Brand (1998–present);
Industry	Petroleum
Founded	(Brand): 1912 by Phinny Brothers Oil Co. ; (Company): 1924
Founder	T.G. Phinny
Defunct	1998
Fate	Merged to Pennzoil to form "Pennzoil-Quaker State". It was acquired by Shell USA in 2002, remaining as a brand
Headquarters	Houston, Texas, United States
Products	Motor oils
Owner	Shell USA
Number of employees	7,400 (2002)
Website	quakerstate.com

Quaker State is an American brand of motor oils, owned by Shell USA, the US-based division of Shell plc.

The former Quaker State Oil Refining Company had been constituted in 1924 after the Eastern Refining Co. acquired rights to the Quaker State brand name to the Phinny Brothers Oil Company, which had been producing the Quaker lubricants since 1912, gaining reputation in the U.S. after a deal signed with automotive manufacturer Franklin in 1914. In 1931, it became the "Quaker State Corporation" after merging with another 18 oil companies. In 2002, Shell acquired Pennzoil-Quaker State for $1.8 billion in cash and $1.1 billion in debt.

The Quaker State name is derived from the nickname for Pennsylvania, the state founded by William Penn, an adherent of the Quaker religion.

The Pennzoil-Quaker State brands are sold under SOPUS Products with the address of Shell's office in Houston, Texas.