In reply to # 1513178 by Roy Didn't someone claim to solve this problem by feeding the center main cap from the oil pump ? CRS
That's certainly a direct approach.
But that would be unfiltered oil, OK for a racecar ... for a street car, maybe not so much.
Plus the oil pump delivers a fixed volume per RPM.
Any too much extra oil sent to the center main, is less available to all the rest.
So now maybe #1 or #4 rod bearing will fail more often instead of #3.
The goal is to distribute the oil uniformly, so that none of them fail more often than the others.