Stoddard-Dayton was a high quality car manufacturer in Dayton,Ohio USA between 1904 and 1913. This make is built by John Stoddard, the son of a Dayton paint and varnish manufacturer. The early cars had 4605cc engines. Six-cylinder engines appeared in 1907. In 1909, Stoddard-Dayton formed the Courier Car Co in Dayton to produce a lower-priced car, the Courier. The final range consisted of three four-cylinder models and a sleeve valve six. The first pace car ever was a Stoddard-Dayton driven by Carl G Fisher to start the Indianapolis 500 in 1911. The company became part of the United States Motor Company and went down when that failed.

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