Fast Guy,

On a dyno cell (not road run in),

The engine is run in on a special "rough" oil to INCREASE friction wear.
The engine is then run at a varying rpm with varying load which increases revs
and load over a period of time usually 2 to 3 hours.
This equates to around 500-800 miles of normal driving.

Then after this period, the filter and oil is changed then the engine is run
for 10 minutes to flush all the rubbish out.
The oil and filter are then changed again, then the engine can be loaded
fully and revved.

All tuners have their own method on the dyno cell for doing this but this particular
method is well proven.