Back in the 1950's when I started rebuilding engines, Perfect Circle recommended accelerating from 30 MPH to 50 MPH in high gear 10 times to seat the rings to the cylinder walls. When doing a break-in on a dyno, once the initial camshaft run-in was accomplished, we would do 3-minute load pulls at 500 RPM increments from 1500 to 4000 RPM or so to seat the rings.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!