Enco commercial from late 1962. Enco (for ENergy COmpany) was a gas station brand sold in the Chicago market by Humble Oil, itself affiliated with Standard Oil of New Jersey but not the Chicago market stations that sold under the Standard brand. Those stations belonged to the American Oil Company, which itself was affiliated with Standard Oil of Indiana. Humble earlier had sold under the brand Oklahoma. Both Oklahoma and Enco, as well as Esso (S-O for Standard Oil) outside the Chicago market, an

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