Interesting read well done.
Though I wonder if its better for your engine to run at correct operating temperature as quick as possible, running cooler I would have thought means running with additional fuel, also the cooling system and oil system have a direct link in terms of operating temperature, Nissan would have had a firm idea at what temperature they wanted the oil temperatures to be.
What's your thoughts?
I doubt the difference is very much tbh and seems like another method of emptying your pocket to me, if you want to to run the engine temps cooler just run a lower temp thermostat.
James
