my warning light came on but i could not tell if eng really was low/out of oil as i was on the freeway. at idle it did sound like it was low/out but there is plenty of oil on dipstick!

has anyone had probs w/ this? anyone know where the pressure sending units are?

and worse case scenario is why would eng starve for oil if there is plenty in the pan? and it looks like plenty on the top end (looking in the oil filler cap). what the heck!?