The section of a bearing that is under pressure
as a motor runs has the thinnest film of oil.
There is only room for so much oil there no
matter how much you mix in to fuel. Once you
have enough to prevent contact, there is no
benefit to adding more. Then there is friction.
The slicker the oil the less wear. You see it’s
the friction of the oil as the components rotate
that wears away the metal. Just as water does
running over a stone. It’s the same for the rings.
For me it’s the quality that will reduce wear
resulting in longer engine life. Others obviously
see it differently.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.