Well, all I can say is, that I had used oem Honda fluid and had sometimes syncro probelms with my tranny. Then I switched to this GM stuff and after 400km the SAME tranny started to get realy loud. I drained it and the fluid was contained with a bit of metall pieces. My tuner said that this oil is too thin for race application or long high speed highway driving, cause it gets too thin when it heats up. HE had probelms with similar oils in the years back too. Opel (a GM brand in Europe) recommend to mix a heavier oil along with such kind of thin oils, cause they had semo tranny problems from factory with thin oils.
Since his is an NSX forum I think some of you race the NSX I guess. I just like to share my experience with you.
A heavier oil will lubricate things better when it heats up than a thinner oil, thats fact. Heavier oil = more heat resistance