wanderer,
1/8" outer diameter lines? Jerry says 1/16" inner diameter - heed his advice.
The mathematical calculation for achieving 100% of the oil being filtered is not that simple; however, approximately 100% of the oil gets filtered in a reasonably short period of time.
If you never lose oil pressure and oil is flowing into all appropriate places in the engine, your bearings will not be starved.
The oil that drips out of the rocker arm assembly returns to the pan via the push-rod holes in the upper part of the cylinder head, and down through the holes in the block near/between the lifters.
