Low oil pressure valve ticking
Just bought 2000 Ranger with 123k miles and lifter noise. I have hooked up mechanical guage and the oil pressure starts at 50 psi at idl. After running for half an hour I'm at 14psi at idle and 35psi@2500rmp. Fresh 5w30 with filter.
What is the oil pressure supposed to be at operating temp at idle?
What would be my next step in troubleshooting process?