oil pressure guage spiking

[Itchintogo]

Something else just dawned on me. I am not sure but most systems have a oil pressure bypass valve. In some cases this is in the oil filer. It is there to stop over pressure scenarios upon cold start up. If the wiring or sender does not fix it maybe changing the oil filter might? Believe me I am grasping here but I know I have heard of filter related problems in the past. If anyone can contribute please jump in.