'89 Olds (Cutlass Cruiser), 75K miles, been serviced regularly. The oil pressure seems to drop sometimes down to 10-20 (almost in the red). We check the oil every week (or every fueling) and keep it up all the way. It never used to do that. It always stayed around 60 + or - 5. When we start the car, its usually around 60, but sometimes it drops almost into the red, but hasn't yet. Could it be the oil pump is failing? Or could it be the gauge?
Thanks in advance.