The traditional and most popular way to settle an engine, is the one that says that the break-in must be done in a controlled, progressive and soft way (Smooth), not exceeding the limit of the 4-5K RPM, during a period of travel that is around 500/1000 miles.
The procedure:
-Press the car
-take the engine about 4-5K (3/4 of accelerator)
-the accelerator's foot (this generates load in the engine and the surplus pressure rises bathing pistons and hoops, settling them, burning the surplus of oil, hence the “moist” until it settles well).
-Dear that the engine drops the turns instead to 1k rpm
-Repeir in each change (preferably 2nd., 3rd and 4th.).
- What is about avoiding at all costs is for the car to remain in some revolution numbers for too long, that is, go at cruise speed.
Any new or rearmed engine in need a soft and progressive settlement of at least 500 to 1000 miles .... except that it is a racing engine, where the walls of the cylinders have been treated (and that that engine is armed to last no more than between 1000-5000 miles).
Any good coach and with sufficient reputation will say that you don't have to punish the engine until it is sufficiently settled.
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