Oil Pressure Gauge PSI Changed Recently WHY?

[diyer2]

I don't believe it's a problem but strange IMO. Oil pressure sensor screen was dirty? Cleaned out some sludge with oil changes? Oil sensor/gauge changed?

Some details.

Bought used with 41k miles, 2012 5.3.

I have been doing 3k mile oil changes.

Same type oil and filter from first change.

 

 

Cold start was about 50 psi. Now the gauge is definitely a little higher than before, maybe 55+ psi.

Idle pressure was 40 psi when at running temp. Now lower, about 30 psi.