94SRUNNER
GOLD Star
650 is normal, so that's fine. Oil pressure gauge is low. On mine that's an indication I need to top it off. Could be a bad oil pressure sensor as well.
I'm not sure that his gauge is off all that much. Mine is similar at idle especially when I am closer to needing an oil change. If you are truly concerned that your oil pressure is an issue that hook a mechanical gauge up and see what kind of numbers you get. If I remember correctly at idle the oil pressure is somewhere in the neighborhood of 7psi and at 2-3000 rpm's it's around 70psi. A search would get you more precise numbers and perhaps it is in the FSM, but I cannot recall for sure.