Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › oil pressure gauge fluctuating › Reply To: oil pressure gauge fluctuating February 8, 2021 at 7:25 pm #988720 Richard KirshyParticipant Please elaborate on your meaning of fluctuating. Do you mean the gauge is bouncing at any given rpm or are you seen a drastic drop in oil pressure once the engine is at operating temp ?