Oil Pressure after oil change

[HummerJim]

I agree with IRA. I had the exact same thing happen with a boat 454 V8 after changing the oil. The oil pressure was running much higher than usual. The mechanic at the marina recommended replacing the filter I had put on, and sure enough, it resolved itself. When we took the filter off it looked fine, but the mechanic said some of the paper elements "can get too much finish spray." I knew it wasn't the oil pressure guage because it is mechanical and not electric. I'd change the filter and see what happens, it's cheap and probably what is wrong, especially if this happened right after an oil change.