I am breaking in a 2004 CRV 2.4L engine rebuild (https://www.crvownersclub.com/forums/75-greetings-introductions/195553-2004-rebuilt-2-4l-motor.html). I installed an aftermarket oil pressure gauge to monitor pressure. I have noticed the oil pressure will jump ~10psi while driving at constant conditions. For example, driving on the expressway at a constant speed and RPM the pressure will be constant at 30psi then jump from 30 to 40psi for 30 seconds, then down to 30psi for ~2 minutes, then back up to 40psi. I notice no performance change or any noticeable change except the oil pressure gauge. I didn't find anything on the internet. Any thoughts?