Jada, I'm seriously not picking on you. But if I am reading the above correctly (and I may not be), that is an incorrect view on pressure changes through a flow path. Pressure always drops as one measures along a flow path; it never goes up. (Seriously, honest-to-goodness, cross-my-heart-and-hope-to-die, etc.) The only way it can increase is if there is an active device in the flow path (a pump) or a resonant effect in the flow (like the 'water-hammer' problem in water piping systems). The pressure drop after a restriction is correct (like in the lower part of a carb throat), and everything in this oiling path is a restriction to some degree or another; the filter, each and every passage, etc.
And logically, you can convince yourself this is so. If the pressure went up anywhere in the system, then the flow would have to reverse. Hmmmm... maybe this is what is causing the idea of oil flowing around back through the filter?
I just want to be sure there are no misconceptions contributing to this situation.
