Your right, it's nearly
Your right, it's nearly impossible to differentiate between brand characteristics from what is published, but where is a consumer to get objective data needed to make an informed choice? Which oil is better for long trips at Interstate speeds in hot weather? Which allows longer change intervals when driven infrequently and for short distances? And how is one to know if 10,000mi. change intervals with, say, 0W16 in a hybrid truly is okay - available consumer tests measure wear metals, viscosity, and TBN, but how can a consumer determine when an oil has aged to the point of depositing on piston rings?