It wasn't really the NOACK that turned my crank about it, it was the whopping dose of moly and boron coupled with above average calcium for cleaning at 2,400 ppm. That was sold me, that and the results when I used it.
The NOACK was a fluke IMO, but the blend of additives was consistent for 3 years or more. Now they have tinkered with it, and while it's still a fine oil I can't tell it from QSGB anymore and honestly I'm suspicious they are now the same oil in different colored bottles. Consumers get to pick whether or not they want to pay for yellow and heavy marketing, or go with low profile green and save a couple bucks.