MPG vs GPW

These days, most of my commute is by bus. I only drive about a mile or two to the bus stop, and it's at a relatively low speed, with plenty of stop & go.

So, my gas mileage isn't as good as it is on a highway. It's actually taken a bit of a dive. But, while my MPG is getting worse, my Gallons Per Week is fantastic. I hardly ever have to go to the gas station. And that's the real point, isn't it?