Sorry to resurrect this thread but thought it better than starting a new (potentially duplicate) one.
Is the oil light meant to come on when you turn on the ignition? Mine has never done that until today. Once I start the engine it goes out, and never comes on again.
I just drove home after a 40 minute cruise along the motorway, no warning lights, everything fine. When I parked the car I turned off the engine and then immediately turned the ignition back on, and lo! the oil light came on. Is that right?