But for the sake of the conversation, what weight oil are you using? You need 8-10 psi per thousands RPMs, and pretty well anything at idle is fine. As long as its coming up when you give it some throttle, and makes 8-10 psi/1000 RPMs, then you're fine.
It just depends on your bearing clearances, and such. If its holding 60 psi at throttle with 10W30, at full operation temperatures, I'd leave it. Thinner oil tends to cleanse better, while a thicker oil bears load a little better.
In my engine, I use Valvoline VR1, and I run 10w30 when I street drive the car. I get about 35-40 psi at idle, at full running temp, when it's 90*-110* outside, and makes 50-55 psi down the highway.
When I go to the track, I put 20W50 in it, and it makes 45-50 at idle, and 60 at RPM (because it bypasses). I run the thicker oil because it bears load better, so if there is an oil pump failure, or something of the sort, it "might" give a 1/16 second more time for error...lol. It'll be more forgviving on the distributor gear, and valvetrain parts.
If you switch like I do, make sure the oil has the same chemical composition. Basically, use the same oil, just a different weight.