Hello there: My Kia optima 2002 automatic engine oil light is coming when i start the car, and remain for a bit of time when i just keep my car start. After making my car heatup for 5 minutes, the light goes off again. But when ever i turnon my car for aftr 1-2 hours of stay, the engine oil light goes ON again. I have changed the oil+oil filter installed original kia oil filter, but no help. So i will appreciate a bit of advice please.