Low oil pressure makes me nervous

pure guess ! go w/ a mech. gauge

Bahhh, it moves the gauge needle so it's fine.:D
Unless something is going to be done about it what difference does it make what the pressure is unless it's zero and the motor will tell you that pretty quick without a gauge at all.
There's a lot to be said for blissful ignorance.

(All meant sarcastically of course) but what his he going to do about right now anyway?:D