hello.I have a 1996 Oldsmobile Aurora.A few months ago we were riding down the road and the oil pressure dropped,then the radiator busted.We replaced the radiator,and an oil sensor.Every since then the oil pressure has been dropping when the car gets hot.We were told to get the air conditioner fixed,so we just got it out of the shopMind you it cost us 900.00.The oil pressure is still dropping and it seems worse now that we got the air fixed...Please help me.This was my grandmas car,and I want to make sure it runs right..