Your car might start without complaint every morning and sail through its last inspection, but […] ...

One overbuilt V-8 that quietly racked up 250,000 or even 300,000 miles.

Each occupant of a turbine-powered aircraft is assumed to weigh 200 lb., thus allowing for stowed luggage and carry-on items. In the case of piston-engine airplanes, we assume each occupant weighs 170 ...