mmm don't really6 care about mpg or l/100K. But being a pom i am new to ther l/100k. more on Mpg. But i know my truck's L/100 because i had to work it out going round aus because a toyota owner at every camp i stayed at would ask me what i was getting out of my deffender. So i found out and then took the **** out of them for the amount their diesel was doing