When the plain rings wear in, they also wear the hone pattern in, wich is not what we want.
Ever wonderd why most modern engines outlast far more then 100000 miles without a re-ring job or consuming to much oil on the rings?
There is not really much advance in the last 60 years of engine building anyways but chrome/molly rings is one.
Make sure you get the right specs for the chrome/molly rings or they will seat really bad.
You also need to have the right hone pattern. This is an absolutley must!
If an engine is done with the right hone pattern, clearences and gap they almost last for ever and give you great compression and much less wear than the plain rings.
