Oil pressure too high?

I'm going to order a new pressure sending switch just for the heck of it . . . theoretically if the switch is fine and the gauge is fine, what else could cause oil pressure to spike so high like this?


Could something I havent thought of cause it (something other than sludge or junk getting caught in a passage)

For the record, I'm pretty darn sure my gauge and switch are actually working fine. Maybe it would be a good idea to get an aftermarket oil pressure gauge to stash under the dash for a more accurate reading.