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Loss of Oil Pressure over 4000 RPM's

Subject: Loss of Oil Pressure over 4000 RPM's
From: Geoffrey Gallaway <>
Date: Mon, 23 Sep 2002 13:16:05 -0400
I was driving to lunch today when I noticed I was going around 80MPH and my
oil pressure was below 50. I let off the accelerator and it started moving
back towards 75. It appears that when the engine is over 4000 RPM's for a
few seconds the oil pressure starts to slowly drop below 50. It would have
gone to 25 if I had let it. I checked the oil, it was fine.

Anyone have any ideas why this happens? I'm guessing it isn't normal.


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