Here is what I would do.....
Install a reliable oil pressure gauge. Choose the lubricant that will not hot idle lower than 20-25 PSI. Amsoil 10W-30 should achieve that, however....best to "verify". I'm also talking about during the hottest months of the year. My GT500 would idle between 27-32 PSI hot during the hottest summer months, all while using Amsoil RD30 10W-30 (Dominator).
You also want to verify that the engine produces oil pressure in excess of 80 PSI at WOT (again, hot). The oil pump bypass should open around 90 PSI. You will notice that oil pressure will plateau around there and level off, despite RPM still increasing.
Thanks for the advice. I plan to run an Oil pressure gauge with the Turbo so I will see what it looks like with the 10W-30 Dominator Oil. I already have enough of the 10W-40 AMO oil if I need to switch.