Oil Pressure????

On a b18c itr engine, or on any other engine, what should the oil pressure be at idel and under load. The Helms manual said that at idle, it should be at 10 psi and at 3000 rpms, it should be at 50 psi. Are these minimum numbers here?? Reason why I asked, at idle, I am at 20 psi (Hot oil) at idle and at 65-70 psi at 3000 rpms!!! Should I be concerned or just be thankful that I have a lot of oil pressure? Any information will be helpful. Thanks