Try to use proper units

[woof]

Well... Fuel economy (with gasoline) is properly measured in Gallons per Mile, which has units of volume (gallons) per distance (mile), which in metric is m^3 / m, or m^2. So gas mileage is technically measured in square meters. Figure that one out

Obligatory XKCD: Droppings

Ok, so what’s the physical interpretation of that number? Is there one?
It turns out there is! If you took all the gas you burned on a trip and stretched it out into a thin tube along your route, 0.1 square millimeters would be the cross-sectional area of that tube.

[Oyvind.H]

Well... Fuel economy (with gasoline) is properly measured in Gallons per Mile, which has units of volume (gallons) per distance (mile), which in metric is m^3 / m, or m^2. So gas mileage is technically measured in square meters. Figure that one out

I`m from Europe. Could you elaborate "mileage in square meters"? Or was it just a joke

[eledille]

Well... Fuel economy (with gasoline) is properly measured in Gallons per Mile, which has units of volume (gallons) per distance (mile), which in metric is m^3 / m, or m^2. So gas mileage is technically measured in square meters. Figure that one out

Imagine the fuel stretched out along the road in the shape of a very long cylinder, and a car that picks the fuel up and burns it as it goes. The fuel economy is the cross-sectional area of the fuel cylinder!

Let's see - 10 liters per 100 km. That's 10/1000 cubic meter of fuel, and 100 000 meters. (10/1000)m³/100000m = 0.1mm².

*edit* Dang - xkcd/woof already did that

*edit 2* There's an error in the final equation in that XKCD post, a "per bird" is missing - email sent