Yea I always fill my filters up as much as they'd take without spilling over (damn horizontal placement). I may prime it just to be on the safe side but sheesh a person shouldn't have to be doing this everytime they change the oil.

I was using 20W50 but am now using Rotella 15W40.

Pressure at warm idle is usually around 25. Startup is around 60-75 and driving is 40-50.