What should my oil pressure be at idle? I'm asking because my car started to run hotter than it should and the oil pressure is lurking between 15 - 35 lbs, would this have anything to do with the engine runing hot? ie, is the engine being hot making the oil thin out, or do I have gasoline dilluting the oil?

when driving on the highway the oil pressure seemed low too, a bit above 20 lbs, and recently it seemed like the OP was fluttering, not dropping, i thought it was the gauge playing tricks.

any thoughts?