Please help!! no oil pressure after oil change!!

What bothers me, here, is that you still have not found the actual cause. Is it a cracked pickup tube? Pump so damn worn that it won't suck 90W? Leaking air past pump seals? To parrot an often quoted phrase, "this ain't rocket science."

My beater "white whale" ram recently lost pressure going down the highway!!! But it was a quart low, and has 200K on the clock, LOL