Quaker State is an iconic American brand of automotive motor oils and lubricants. Founded in 1912 in Pennsylvania, the company built its reputation on processing regional crude oil before evolving into a global name in engine protection. Today, it operates out of Houston, Texas, as a subsidiary of Shell USA. Originally starting as the Phinny Brothers Oil Company, the modern corporate entity took shape through a 18-company merger in 1931. After merging with its long-time rival Pennzoil in 1998, the joint company was ultimately acquired by Shell in 2002. Quaker State remains heavily embedded in automotive culture, maintaining a visible presence as a frequent sponsor of major motorsports venues.

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