Earlier quoted context omitted.
Gack... one of my pet peeves: 90% of my friends compare car millage in terms of "how much money I spend to refuel", completely ignoring: 1. Significantly different tank sizes - 53L to 70L on regular cars. 2. Different prices of gas (suburbs vs downtown, 87 vs 91 octane, etc) 3. Different habits - some refuel at 1/3 left, 1/4 left, 50km left, yellow light on, needle at the end of the gauge, etc It drives me absolutely…
I have never heard of anyone judging fuel cost outside of miles/kilometers per gallon/liters. Where the hell do you live
Rather, if you ask them casually in an informal setting "Does your car get good milleage", they'll say things like "Yeah, it only costs me $50 to fill it up!" or my personal favourite, "Yeah, I only have to fill it once per week" --> the amount of unspoken variables in that one just boggles the mind, but goes to another commenter's point of "practical perspective". "How often I need to fill it up" is probably a sane, pragmatical way to think of milleage. It may in fact cut to the point faster than saying "it does 11L / 100km", because while it answers some questions in abstract, it doesn't actually answer the practical considerations of how often I need to refuel / how far can I get on a tank.
As mentioned in my another reply, for me at least, it hasn't been a factor of where I live but variety of company I keep -- on average I'd say my Comsci/Sci-major friends don't do it.
But I'm currently in Canada, where we do indeed as per stereotype, measure distance in units of time ("How far is your work?" "About 20 minutes" ComSciMajor response: "GAAACK!")