Fill one’s tank

To fill one’s tank, the answer is GASUP. This phrasal verb means to put gasoline or fuel into a vehicle’s tank. It is a common expression used by drivers when they need to refuel their cars or other vehicles. To gas up, one needs to find a gas station and pump the required amount of fuel into the tank. This crossword answer is a simple and concise way to describe the act of filling up a vehicle’s tank with gasoline.