80 x 34 advertising banner that has survived a long time, longer than the fuel company it advertises? Tydol gasoline, Flying A

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Tidewater Oil Company (rendered as Tide Water Oil Company from 1887 to 1936) was a major vertically integrated oil company that operated independently from 1887 to 1926, when it was sold to a holding company. 

Over the decades, it passed through various corporate hands. It sold petroleum and gasoline products and fuel under various brand names, including Tydol, Flying A, and Veedol.

 In 2011, Veedol was sold by British Petroleum to Tidewater India.

https://en.wikipedia.org/wiki/Tidewater_Oil_Company