That's one of the most unscientific pieces of "data" I have ever seen:
Quote:
"I took several trips hooked up to the trailer and loaded with gear. I sought the most severe conditions I could find, like the 7 to 8 percent grade on highway 395 headed to Dead-man Summit out of Bishop with the outside air temperature at l02º. I left the transmission in fifth gear and pulled the grade at 65 mph. I was never able to get the NV4500 transmission to hit the l90º mark. The Dana 70 rear differential never exceeded l50º. Numerous other trips included highway 50 to Carson City and Highway 5 traveling in both directions over the ‘Grapevine’ netted the same results."
AMSOIL Technical Services reports these temperatures are 20º to 50ºF cooler than temperatures normally found in comparable units under comparable conditions.
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The only way the data could be "comparable" would be to record the temps with Amsoil and then drain, refill with another oil, and record those temps.