Ok upon further reading it is true. Rings do rotate. I thought they do not. So that leads me to this question. Sense the rings are rotating what exactly is going on with the ring/cylinder that makes them seat in and have more compression after an hour run time opposed to a new none run engine. I had always wrongly assumed that the ring's kinda key into the micro scratches and wore into the small voids increasing compression/locking the ring in place,,But that ain't what's happening
Pat