I can see this thread going on for another 50 pages with various degrees of indignation, threat and persecution being expressed.
In reality, 99% of you will never have a problem from high oil temps (real or perceived).
Nissan is not going to do anything about it as they've decided high temps are OK.
Nissan has no obligation to pay for any warranty work that may occur from the failure or interaction of a part YOU put on the car.
Quit whining and enjoy your cars
Spend <$300 and install a cooler if it's an issue for you. How to here:
http://www.the370z.com/diy-section-d...ttsa-pics.html