What is a good cold engine idle oil pressure, and what is a good warm engine idle oil pressure?
For most modern Fcars (348 and above), cold pressure should be roughly 70-80lb with a hot pressure around 20-30lb. Oil weight will change the pressure slightly.
When hot or cold mine runs at around 70PSI when at 2000 RPM or above. Idle pressures are lower of course -- when fully hot mine idles at 25PSI. Alan