Humble Oil

Humble Oil and Refining Company was an American oil company founded in 1911 in Humble, Texas. It was chartered in February 1911 by Walter Fondren Sr. and the brothers Ross Sterling and Frank Sterling, joined by their sister Florence Sterling, and was reorganized and incorporated as Humble Oil and Refining Company in 1917. In 1919 Standard Oil of New Jersey acquired a half interest in the firm and bought the rest in September 1959. Humble sold gasoline under the Humble, Enco and Esso brands, introducing Enco in 1960, and promoted its Enco and Esso Extra gasolines with the Put a Tiger in Your Tank campaign from 1959. In 1972 the company rebranded its stations as Exxon, and in January 1973 Humble became Exxon USA as Standard Oil of New Jersey became Exxon Corporation. Its assets are now owned and operated by ExxonMobil. Scientists at Humble also published a 1957 study tracking the carbon dioxide added to the atmosphere by burning fossil fuels.