I've learned that finding discarded vehicles with astronomical figures showing on their odometers can be very difficult. Most manufacturers stuck with five-digit odometers well into the 1980s and even the 1990s, which rules out a majority of potential high-mile candidates right off the bat. With more recent vehicles, electronic digital odometers won't display unless you power up the main ECU— theoretically possible in a junkyard, but a real hassle. The most likely old cars to rack up interstellar mileage (Mercedes-Benz diesels) are also among the first to have their instrument clusters harvested by boneyard-prowling eBay sellers. Fortunately, Honda began installing six-digit odometers around 1981, and so today's Junkyard Gem (found last winter in a Denver car graveyard) can share its very impressive final odo reading with us.