Miata Mailing List: March 1993, Message #108
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   From: (none)
Subject: Re: Oil Pressure Problems
   Date: (none)

I would second a recent post concerning the normal oil pressure after
warm up.  I've had my Miata since Sept 1989 and have had either 10-40
or 10-30 oil replaced every three thousand miles.  After a warm up
(highway driving for 15 minutes for example) I have always noticed
that the oil pressure at idle (about 800 rpm) is between 0 and 30
(i.e. 15-20).  I wonder if others have also noticed this.  It's
possible that the real pressure may be somewhat higher but the gauge
is not accurate at or near idle.

Herb Samuels