Fill her up!

This is a time-honored expression that has gone the way of credit cards and self-service. In the good old days, when you would pull into a service station for gas, the attendent would approach your car with a question on his face, and you would tell him a dollar amount of gas you wanted, or would say "Fill her up!" And he would do it. And wash your windshield. And check your oil. And check the pressure in your tires if you wanted him to. And you did not have to get out of the car.