Well, he multiplied both numbers by a huge number and included far too many digits, obscuring what it means. Here comes the advantage of SI (notice that only mu

Well, he multiplied both numbers by a huge number and included far too many digits, obscuring what it means. Here comes the advantage of SI (notice that only multiplication by 10 is needed): 29573.53l/100km = 0.29573531 l/m =~ 0.3 l/m A way to visualize this is that if you put the fuel needed in a pipe along the route the vehicle rides, then the pipe has a cross section of 3 cm^2 (hey those SI units are handy!).