Low oil pressure makes me nervous

Here is a Mopar oil pressure resistance chart:

Oil Pressure, PSI - 0 10 20 30 40 50 60 70 80

Resistance - 68.0Ω 40.0Ω 31.0Ω 25.0Ω 21.0Ω 18.5Ω 16.0Ω 14.0Ω 12.0Ω

The 25W-60 has been changed into the crankcase and pressure is up a notch. Been driving in 100+ temperatures this past week where the factory coolant temperature needle climbed just to the right side (a hair past the middle point of the gauge) on the freeway at speed. No boilover, though.