2002 3.2 oil pressure oddities

[Geof3]

Driving home from a bit of a road trip today, I was cruising down the freeway at about 3200rpms and noticed my oil pressure gauge doing odd things. Generally, the pressure shows normal around 45-50 PSI. However, it would randomly spike up (once tapped 8 bar) and then settle and be fine. Oil pressure at idle is normal, car runs fine. It is ENTIRELY possible it has done this since I installed the gauge, but not noticed it. I just happened to see it happen this time. 996 sender is relatively new (1.5k miles). Prob not an issue at all, just wondered if anyone had any thoughts.