As a young man serving my apprenticeship at a Lincoln dealer. A friend of the family bought a new Lincoln. Within 4 months. The engine failed. Being a friend of the family, I got special permission to "rebuild" his engine. I hand filed compression rings and hand seated bearings. Not to mention measured and made sure that engine was to exact specs. The owner was upset with me because I had not replaced his engine with a new one. I assured him, that the one I built was better than new. And he reluctantly accepted it.That engine lasted him over 100,000 miles, and last I saw that car, he had given to his grandson to drive to college. The point is, if you get a "new" motor. You get whatever the chinese assemble and ship. A remanufactured motor. You get a motor that someone has taken the time to make sure the motor is "right".