Anti-Friction Lubricant

What they do Mex is their not exactly built to fail, but they do know about when they'll fail. How they do this is with test mules. They have a robot that repeatly runs all parts of the car till failure. An example is the gas pedal. They use a test mule to repeatly depress it to the point of failure. It might be many thousands or how many times who knows? If it lasts too long, that means they can make it a little cheaper and shave a few pennies off. Sometimes they make serious mistakes. Dodge did this with their ball joints. They kept shaving metal off but got a nasty surprise when the winter salt, from back east, eroded the joints prematurely and the whole wheel would depart the vehicle. The test mule didn't take that into account. The data that the test mules generate is a closely guarded secret from competitors.