My grandfather owned a gas station in the mid 30s. (No, I wasn't around then, I'm *only* 39.) The pumps held 10 gallons - they were the kind where a hand pump moved the gasoline up into a big glass tank up top - it had the gallons calibrated on the side of the glass. It held 10 gallons, and they sold that amount for a dollar. Whenever a tin lizzy came in and bought a bucks worth, they'd let a gallon run out onto the ground - a model T only had a nine gallon tank!

- JimY