straight 30 wt syn will make your low oil pressure worse you need heavier oil like 20-50 or change the oil pump spring to a high pressure....your oil pressure is wayyyyyyyy to low for my likings.
I use 5-30 mobil1 with a high pressure spring in my oil pump and when i start the car i have 70 to 80 psi and when i am at the end of the 1/4 and hot i am at 50 psi never seen it lower then 45 psi