The crossword solution for the term 'Bygone Gas Station' is ESSO, which is a four-letter word. ESSO is a brand of gasoline and motor fuel that was first introduced in the United States in the 1920s. It is now owned by ExxonMobil, one of the world's largest oil companies. ESSO has been a popular choice for gas stations in many countries around the world, and it continues to be a recognizable brand today.