The Phillips 66 cottage-style design program
Phillips Petroleum was founded in 1917 in Bartlesville, Oklahoma, and entered the retail gas-station business in the 1920s. The Phillips 66 brand name was launched in 1927 — derived from the company's discovery that their gasoline produced a road-test fuel-octane rating of 66, and from the fact that the company's tank truck was traveling on U.S. Highway 66 (Route 66) during the test. The name and the Route 66 connection became central to the brand's mid-century identity.
The cottage-style architectural program was developed in the late 1920s as part of the brand's effort to differentiate Phillips 66 stations from competitors and reduce community opposition to new station construction. Architect Clarence Reinhardt is generally credited with the design vocabulary; the program produced standardized plans that were adapted to local site conditions across the company's expanding retail network from the late 1920s through the mid-1930s.
Cottage-style Phillips 66 stations were built across the central United States during the program's roughly seven-year run. Estimates suggest several hundred were constructed, though most have been demolished or substantially altered across the intervening decades. The surviving original examples — including the McLean station, the Bartlesville stations near the company's original headquarters, and a handful of others scattered across Oklahoma, Texas, Kansas, and Missouri — are now recognized as significant examples of mid-century commercial vernacular architecture.