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https://xkcd.com/3123/ https://xkcd.com/3123/
https://xkcd.com/3123/ https://xkcd.com/3123/
I believe the phrase was originally about "mileage" as in fuel economy (i.e. miles per gallon), but "total mileage" (i.e. odometer reading) is pretty close!
Please don't do this, you aren't adding anything to the conversation