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.