oil warning light

[Brucelee]

My guess is simply a bad oil pump.

Second would be some issue between engine and semi dry sump.

[CJ_Boxster]

Same here, oil pump goes and you will hear whining in the engine...do you hear lifter klattering yet?

[deliriousga]

Oil pump or oil separator. When the separator goes, the oil filler tube collapses, cracks and starts to make whining sound that is similar to a slipping belt.

[wvicary]

Remove the oil pressure sender and install a gauge to measure the pressure at idle with the engine at operating temp and over the RPM range of the engine. It could be just that the pressure sender is going south.