Originally Posted by
HTupolev
The area where the pins roll is where chain "lengthen" with use, but it's because the pins wear, not because lubricant gets forced out.
THAT makes sense to me. The lubricant thing didn't.
And directional after using the chain for a while makes sense, too, but not that a new chain would be impactfully directional. I would guess that after a while, wear would lead to similar performance in a normal or backwards chain.