When we talk about a car’s fuel economy, what we want to know is how much fuel does it use, not how far does it go. Now I grew up with the metric system and I

When we talk about a car’s fuel economy, what we want to know is how much fuel does it use, not how far does it go. Now I grew up with the metric system and I would not generally agree with that statement. The function of a car is to transport me, so its output is distance. Measuring the output I get, rather than how much a standard unit of output would cost, makes sense to me.