[JediJones]

They would definitely charge a delivery fee. They’d also want to cart around their cigarettes and candy bars and sell those. It’s possible they could reach more customers by selling a smaller amount of gas per customer door-to-door, instead of letting everyone fill up to the max at the station. Then with a broader customer base they have a bigger base to sell the snacks and goodies to. Just take orders over the phone just like a pizza place.

[RegulatorCountry]

Convenience stores were not the norm at that time, traditional service stations by far and away predominated, pumping your own gas was a novelty, the attendant cleaned your windows, checked the air in your tires and such while filling your gas tank. They were more garage oriented. A soda vending machine, a snack vending machine, a cigarette machine and maybe a newspaper rack was the extent of their non-automotive sales offerings.