Engines are pre-run after being built and they drive the car off the assembly line to a parking lot, then another parking lot, then they are driven onto the transport truck and driven off the transport truck and around the dealership... BUT none of these drives heats and and seals the Piston Rings the way the buyer will do once the car is purchased and taken home.
I recall back in 1985 when I bough a new Prelude I took a long multiple freeway drive varying speed and RPM. Never had any engine problems and sold the car with 142k miles on it...
