Encyclopedia Dubuque
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Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.
SUNRAY DX OIL COMPANY
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SUNRAY DX OIL COMPANY. In 1968, Sun Oil merged with Tulsa, Oklahoma-based Sunray DX Oil Company, which refined and marketed gasoline under the DX brand in several midwestern states, and included several refineries. (1)
The 1964 Dubuque City Directory listed 400 E. 3rd.
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Source:
1. "Sunoco," Wikipedia. Online: https://en.wikipedia.org/wiki/Sunoco
