[FC3S Murray]

Hey I have a little concern with my oil pressure:
I have my idle set at 900 rpm and upon start up I have extremely high oil pressure due to running a FD regulator. Anyway when it settles at 160* oil temp the pressure is about 40 psi. After driving around and getting the oil temps around 175-180 my mechanical aftermarket Oil pressure gauges shows about 11-12 psi at idle........

This seems low. If I barely rev the rpm up to 1K(which my idle is set there now) it sits at about 17-18 psi,which is within factory spec BUT thats at 1k NOT 800 rpm.

I know what the front o-ring symptoms are and this doesn't seem like it because when I rev and drive the car i get upwards of 90 psi around 4k. 0-ring symptoms are bleed out at 40 psi and doesn't get any higher with revs.

My concern is it being that low and how low will it register when I have a long time frame of WOT pulls and get the oil temps even higher. Right now I am running Castrol GTX 10w-30. I will go to 20W-50 Mobil 1 syntheic when break in is complete.

I didnt shim the front cover regulator because I didn't know you were supposed to with the FD regulator. The Oil pump was nin perfect shape.

Any ideas? I have heard oil pressure at idle is not a big concern but I NEVER like low pressure regardless.