Hemi oil pressure

OK, so this 2004 Dodge is making me crazy. Now we've got some damned oil pressure issue. When the engine goes to idle, which seems to be down around 5-600 RPM, the oil pressue drops to zero. Lights and buzzers go off, etc. As long as the engine is turning 7-800 RPM, it is fine. So, is my issue oil pressure, or idle related? Anybody? Yes, oil level is correct, using Mobil 1 syn oil in it.
Author: storm king