Oil pressure gauge quiver and PSI

[dmperfection]

I recently started noticing that my oil pressure gauge needle starts to quiver a little at idle. My '02 5.3L has 208k miles. Is this common? Once I accelerate and get rolling the needle is absolutely stable.

Also, at idle, my oil pressure gauge is ready between just under 35 and 40 psi, and at acceleration just over 60 psi. Are these pretty normal? Maybe I never paid much attention, but it started to worry me a little when it drops to just under the 35 psi needle marker.

Thanks!