I've been having a bit of an issue with my car recently. When I've been driving for long periods and the engine is up to temperature I find that when stopping in traffic the oil pressure will drop right down to almost zero and the oil warning light will flash intermitently. The water temperature tends to run a little bit on the warm side in traffic, between 90 and about 95 but nothing too excesive and I don't know what the oil temperature is like since my guage doesn't work. Both the oil level and the coolent level are within the limits.
Does anyone have any ideas? Should I be worried about this?