 Despite the success of the "Put A Tiger In Your Tank" advertising campaign introduced by Humble in 1959, to promote its Enco/Esso Extra gasolines, the similar oval logotypes, the Happy Motoring!tagline used in advertisements that also appeared overhead of service bays at each station, use of the Humble name in all Esso/Enco ads and the uniformity in design and products of Humble stations nationwide, the company still had difficulties promoting itself as a nationwide gasoline marketer competing against truly national brands such as Texaco — then a 50-state marketer and the only company selling products under one brand name in each state.Humble officials realized by the late 1960s, the time had come to swallow its pride by developing a new brand name that could be used nationwide throughout the U.S. At first, consideration was given to simply rebranding all stations as "Enco", but that was shelved when it was learned that "Enco" is a Japanese abbreviation of 

To create a unified brand, the company rebranded all its U.S. service stations, along with its gasoline and other petroleum products, from Esso and Enco (Humble in Ohio) to Exxon nationwide during the summer and fall of 1972, following the successful test marketing of the Exxon brand and logo in late 1971, and early 1972, at rebranded Enco/Esso stations in certain U.S. cities.