'02 Hyundai Accent, 165K miles.
My route to work is six miles of secondary roads and city streets (25-40 mph), followed by 16 miles of interstate highway (65-70 mph), then another nine miles of secondary roads and city streets.
I have noticed only recently (last couple of weeks) that when I get to the end of the interstate leg in either direction, as I wait for the light at the end of the ramp, my oil light will flicker (sometimes very faintly) if I leave my foot on the clutch. If I get into neutral and release the clutch, the light stays off. It will do that at two more stops in rapid succession, but by the time I am at the last traffic light or stop sign of the trip, it has stopped flickering regardless whether the clutch is in or out.
Oil is recently changed and at proper level.