Big T
Well-Known Member
You don't need pressure, you NEED volume. Pressure does you no good if your not getting oil volume. I've seen engines running 60 lbs of oil pressure lockup from oil starvation because the oil wasn't getting where it needed to be. Run the lowest viscosity oil you can while holding minumum oil pressure desired, and keep the oil pressure down to say 45-50 max hot. Anymore is just wasted HP doing nothing but creating heat in your oil and wearing out your oil pump drive and gears. Trying to push more oil pressure than needed is only adding load and wearing your oil pump out as you can only push so much oil through the galley orifices and bearings.
I'm running synthetic 0w40 in my '99 with non-Optimizer block. When hot, the pressure is 30 psi at idle and 40+ psi when driving.