Again, don't want to flame
So, please don't shoot the messanger! That was their words....but they did acknowledge what you had said earlier...that there was an underlying issue of airflow through the compartment.
You have not commented on what I am considering, which is an accessory engine oil cooler. It seems like a simple install and benefits at all speed ranges?!?!?
http://www.derale.com/derale/index.html
See fan mounted oil coolers.