Only the USA, North Korea and Liberia still have archaic medieval measurements, the entire rest of the world recognizes and follows the ISO, the International Standards Organisation and is metric, since 1861...
It's a wonder the word and associated common sense hasn't gotten around yet!
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View my fuel log 2013 Space Star Cleartec Intense 1.0 manual: 55.7 mpg (US) ... 23.7 km/L ... 4.2 L/100 km ... 66.9 mpg (Imp)