What I was getting at is that getting into the mind is more important than what's in the bottle. Once you get something into your mind it's harder to change it later. Many of these GIII synthetic oils may be different in the bottle, but it's more important to be in the consumer's mind, first. These GIII oils are so good that the difference between them may be more a case of nit picking, then differences in the end result of using one oil vs another. Cars are so good today, that the difference between oils on a car by car basis could easly be confused but driving habits and weather. One could probably take a 0w-30 GIII based oil and use it anywhere in the world, in any kind of reasonable temp from a little below zero to over 100F and that one oil will have the situation covered. How a quart of GIII 0w-30 oil performs today, in combination with any new car is a marvel of the industrial age. Given equal situations there is no need to fret over the differences between any current GIII oil, just pick one. The Playing Field is level.