Does anyone have any ideas as to why my oil pressure light is staying on up to almost 10 secs after starting car in the morning. The light usually goes off right the way after I started the car in the past. The light only stays on longer when the engine is cold, in the morning. I was guessing that the oil sending switch could the the problem. Also, I am using 5-30 oil and I live in CA so the temp. is not too extreme. By the way, the car is 99gs with 28,000 miles. Any ideas??????