Earlier quoted context omitted.
This blew my mind as an American kid visiting England a couple decades ago. I was only ever aware of putting in a credit card and filling up a gas tank all the way, and my uncle took out a 5 or 10 quid note to go pay before filing petrol and he said why should I pay to haul around extra fuel if I pass by the petrol station everyday and I only use half a tank every 2 weeks.
Somebody should do the math of pulling out to the gas station vs. driving with a full tank.
Much fewer proportion of people are driving those peugots or other tiny cars where the weight of fuel would be material relative to the time it would take to fill up fuel more often.
Another British thing that amazed me was their auto insurance prices were based on engine size, and they were fretting about the insurance cost between 2L and 3L cars, and all the vehicles we had in America were 4L+.