The U.S. was a very early user of the metric system thanks to Alexander Hamilton. He realized how screwed up our measurement system was with a foot being the length of the kings foot, an inch the width of his thumb, and a yard the distance from his thumb on his outstretched arm to the tip of his nose. As secretary of treasury he mandated the dollar system for our money which is metric. Not even the Queen can decipher the pound-pence system but our system with a hundred pennies to a dollar anyone over 60 can figure change in their head.
Now for an example of distance, if it 40 MILES to my house in town, how many INCHES is it? If it were 40 kilometers one can figure meters, centimeters, and millimeters just by moving the decimal point (like with our money where a dollar is 10 dimes or a hundred pennies). As pointed out by Jon, going retro with engine sizes is idiotic but many of the big box store sites list ONLY in liters. This rant is just started as next we move to RENAMING old standards; maybe to be PC? When I was in school what was cubic centimeters (CC's) is now milliliters, centigrade is now celsius, etc. I would love all new stuff being in metric and all old stuff left alone.
