20 psi at 700 rpm
When really hot drops to about 18 at 700 rpm.

Stays around 40-45 psi cruising at 3000 rpm.

 

damn at 3000 rpms... what kinda crusing you doing?

the only time my rpms are that high when im not on the gas is when im goin about 90mph

 

Idle for a stock LT1 should not ever go below 17 psi. That is by GM. I also know that Mobil 1 5-30 and other synthetics make the oil pressure lower. I don't know why that is

I switched to Havoline 10-30 and my oil pressure drastically improved. And have not lost ANY oil. It has been at the FULL mark every time. I have not had to add a drop. When I was running Mobil 1 or Amsoil, I had to add every so often. And when I sent my samples off to Blackstone Labs, my reports have been better since I switched to reg. oil.

The higher the mileage, the heavier the oil should be. I have 86k
on my 95 Z. And it is pretty heavily modded.

Another reason could be that your oil pump is starting to go. I heard low oil pressure was a sign of the oil pump dying. That is hearsay though.

Good luck

 

Chilton says it should be 7psi at idle. Sounds low but it's right from the books.

 

60-70 @ idle (when cold)
25-50 @ idle when warm

 

LMFAO! Thats my kind of cruising though


About Mobil 1, the funny thing is, as soon as I switched to it I noticed the low pressure and my engine developed a misterious oil leak. After I switched back, the oil pressure went up and the Leak stopped. I am still clueles about this.


Marvin