Originally Posted by shoemike
From my experience with connecting a mech. OP gauge,
the line below 40psi is 35psi and the line above 40psi is 70psi.
unless you are in the red don`t worry about your OP.
For some reason people on this site think the LS1 needs to have 60psi OP
all the time.
High OP does not equal high flow.
Good info. But the guy said:
Originally Posted by gc302047
. it just recently started doing this.
Maybe he just recently noticed.
Have you seen the book specs on LS1 oil pressure? It says something to the effect that 5 psi at 550 rpm idle is fine.
I do have a general rule on oil pressure: anything under 20 psi--theres usually a problem.
To help the OP with his OP
I'd go to a thicker oil and see what happens.
I was reading a google search on oil not long ago and ran accross this article.
It was about oil recommendations in some supercar type (lamborghini, or one of those)
He said the owners manual actually has a recommended oil viscosity chart based on vehicle useage, average oil temps, and mileage
I agree that a thicker oil should be used with higher mileage. But the OP's concern about it happening suddenly makes me think there may be a problem.
Maybe a recent (or not so recent) oil change, viscosity change, filter brand change. These can all have a slight effect on oil pressure.