Oil light - both on and off

[sawdustar]

I've noticed that my oil light comes on with the ignition switch "sometimes" and I think it should be coming on "every time" I turn on the ignition switch. Y'all will probably have to educate me on this but seems to me that something is needing replaced or repaired?

[Daniel Meyer]

Should come on with the switch and go out immediately on starting (standard).

Could be the oil pressure sensor, the bulb or wiring, or perhaps a loose ground up there somewhere...

I would check to see if there's voltage to the bulb with the key on and engine not running. If so, there's a bad bulb, socket, or ground...