You want the
oil temp to exceed the boiling point of water or above about 210 so it can outgas the condensate and other contaminates. You also want it to reach operating temp as soon as possible so a bypass to cooler or a control valve is a must to help
oil reach that temp in cooler country. Most or average oils want to be about 220 / 240 as ideal with cooler keeping below the 270 range. You can go to Valvoline oils web site and get all spec's and written better too!
All manufacturers have great info available and will dispell old beliefs like needing high
oil pressure from heavier oil weights . Idle P of about 25 hot is fine and the 60 lbs I wanted years ago just takes HP to create. Higher pressure will help if sytem has volume problems but if all is right the lower pressures are actually best.
I build a PRE oiler system that pressurizes system before starting and supplies oil pressure if a fault happens while turning engine off at same time to save engine components. Everybody should build one. THEY WORK!!