I installed an oil pressure gauge on my 89 GL and
I measure 22 PSI at 2000 RPM after a warm-up by
driving 20 miles at 65 MPH.  I am using Castrol
20W-50.  At present I have no way to measure oil
temperature, but I will work on that.

The Bentley manual says at 2000 RPM and 176
degrees F, the minimum pressure should be 29 PSI.
However, the low oil pressure warning buzzer is
not supposed to sound until 13.1 PSI.  This seems
contradictory, unless 29 PSI is actually the
minimum standard for a new engine.

What minimum pressure, at the stated temperature
and RPM, do you accept as normal in an apparently
healthy 2.1 waterboxer?  What pressure do list
members observe in new engines?

Mike <mjcatlin@pacbell.net>
Davis, Calif.