You may be right about the Amsoil in the manual, but you are not right about the rings.
They are not made of work hardening steel, but white cast iron. In the heydays of model engines, the cylinders were made of workhardening steel.
Because the rings, which btw are quite hard to begin with, do not alter their hardness, it is best to let the engine work as hard as you dare, but not long enough to overheat anything. Heat flow from ring to cylinder and from piston to cylinder is not all that good yet. This hard work will seat the ring in the ring lands and to the cylinder wall. At the same time, high machining spots will wear off. Due to the many heat cycles, internal stresses that were set up by several machining steps are relieved (accelerated aging). Storing your engine in the attic for ten years would serve the same purpose.