I had around 30psi on my gauge when I got the car, but did an oil change 1,000 miles early and used a Motor Flush kit for the engine oil. The oil came out pretty black! But after the oil change the gauge stays at or above 40.
Many people don't like oil cleaners that remove sludge because small oil holes can be clogged by sludge.(so, I have been told) I on the other hand motor flush every 3-4 oil changes. My Ford Explorer is still running at 280,000 miles and my 390 didn't have varnish/sludge anywhere when we opened it up to do some head work. I'm kinda big about cleaning solvents like motor flush and fuel injection cleaners. Tranny fluid works well too.(but that'* another story)
If your cool with it you could do a "motor flush" on the engine oil and see if it helps any.