Well after taking a nice sweeping off-ramp at a reasonable speed (if it weren't for the 5 series in front of me it may have been taken at an un-reasonable speed
but I digress). I then accelerated up to traffic speed after the ramp and then noticed the oil light on. Maybe 30 seconds maybe longer. I pulled over as soon as was prudent (I ain't going to get killed just to save a motor) Looked at the dipstick and it had oil on it, a little bubbly maybe but the engine was just turned off. I only had a 1/2 quart with me, put that in, fired up and no light, temp was a hair lower then normal and there was the normal amount of steam comming out of the oil filler (PCV vents to outside, not to the intake).
Things I know: This is bad, the idiot light only goes off at below 7 psi. My car has done this in the past when a quart low going around turns it would flicker. The engine seals leaks like a seive.
Things I don't know: What happened, is this the typical failure mode for no oil pressure? I allways thought lack of oil shot the temp up too.
Is it possible my idiot light is failing? Maybe an air pocket is the system by the sender? Was I driving too hard, I never hit 5000 but was at 4000 for a while there.