In article
outautos.com>,
"Solara" > wrote:

> I watched the gauge very closely as we drove this weekend, and it
> does start out getting at or near 90 psi with the engine cold, but within
> 2-3 minutes as the motor warms up, the pressure begins to hang out at or
> below 60 psi, and I can see the relief valve working as I run up the
> RPM's. Appears the pressure climbs until about 62-65 psi, as RPM increase,
> then at about 2500-2700rpm, the pressure drops back to slightly under 60
> and pretty much holds there as we drove. At idle, I have about 30 psi,
> again, all on the car gauge.

You've just described the normal operation of a healthy Miata engine
with a real oil pressure gauge. Stop worrying.

--
Lanny Chambers, St. Louis, USA
'94C
the alignment page:
http://www.hummingbirds.net/alignment.html