I think we could reduce the litres / km (volume / distance) units to just square meters (area). For example, 7 litres / 100km = 0.07 mm^2 It's the cross-secti

I think we could reduce the litres / km (volume / distance) units to just square meters (area). For example, 7 litres / 100km = 0.07 mm^2 It's the cross-section of a noodle of fuel laid out along the road that the car needs without a gas tank.