Agreed...If 10W-40 doesn't provide adequate oil pressure, you have other problems...

Should have specified on the synthetic.... I do the initial run in on 10-40 Valvoiline, 30 minutes or so depending on what the cam is, etc. then change the oil and filter. Then run a few hundred miles with 10W-40 to get the rings seated and make sure everything is leak free and working right, then I switch to synthetic.