Just to let everyone know that I have received a follow up call from Nissan regarding the oil cooler issue. They stated that their research is over on this issue and that they will not be offering an oil cooler that will be covered under warranty and that the vehicle performs for its intended purpose. Define intended purpose is that at this price point nissan belives the 370z is a daily driver car not intended for sport driving. (no reason to purchase the sport package for any buying)
So Nissan will not be doing any of us any favors, as far as the warranty goes still could not get a very straight answer and would still be a case by case issue. They did make the remark that by installing an oil cooler that it is viewed as a competition part that has been placed on a vehicle that is not intended for competition use. So I will let you read between the lines.
This issue is closed for myself and will consider the options that are available.