Oil Pressure

[garyhugo]

Over the last couple years and 6000 miles or so my oil pressure gauge has more and more often began to bounce.I'd say 10 psi or so when driving. It will do it under throttle or coasting.It does it half the time anymore.I've changed the oil pressure sensor and it still does it.Is this a sign of catastrophic failure just around the corner? The engine has 172000 but not particularly hard miles.