Oldsmobile was a brand of American automobiles produced for most of its existence by General Motors. Olds Motor Vehicle Co. was founded by Ransom E. Olds in 1897. In its 107-year history, it produced 35.2 million cars, including at least 14 million built at its Lansing, Michigan factory. When it was phased out in 2004, Oldsmobile was the oldest surviving American automobile marque, and one of the oldest in the world, after Daimler, Peugeot and Tatra. Though it was closed in 2004, it still remains an active trademark of the General Motors Company. The closing of the Oldsmobile division presaged a larger consolidation of GM brands and discontinuation of models during the company's 2009 bankruptcy reorganization.

Ransom Eli Olds (June 3, 1864 – August 26, 1950) was a pioneer of the American automotive industry, for whom both the Oldsmobile and REO brands were named. He claimed to have built his first steam car as early as 1894 and his first gasoline-powered car in 1896, his first Oldsmobile in 1897.

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