An experiment conducted by British TV show Top Gear in 2006 offers one explanation. The show’s producers bought an 18-year-old Hilux diesel with 190,000 miles on the odometer for $1,500. They then crashed it into a tree, submerged it in the ocean for five hours, dropped it from about 10 feet, tried to crush it under an RV, drove it through a portable building, hit it with a wrecking ball, and set it on fire. Finally they placed it on top of a 240-foot tower block that was then destroyed in a controlled demolition. When they dug it out of the rubble, all it took to get it running again was hammers, wrenches, and WD-40. They didn’t even need spare parts.