How much should oil pressure fluctuate? My dash gauge normally reads about 50 psi, but today driving the backroads of Georgia at 40-55 mph, the gauge was fluctuating between 35 and 40, and I just don't remember ever seeing that. I hope I'm wrong.
Does it read 20 or over at idle? Hot. If so you are probably good.
Any pressure fluctuation from normal is usually a sending unit or a bad ground somewhere. Voltage changes can effect instrument readings.
Pierce
Yes, with engine warm, at idle it reads 20 psi.
We've done another 600 miles and the engine hasn't seized so I guess we're good.