Correct. In a nutshell, that is the whole story.So who's done all the required testing shown in Table II in this case ... Oronite? If so, then I'd expect all their extra testing costs to meet the dexos spec is reflected in the cost of their additive package. If they have done all the testing to satisfy GM's licensing requirements show in this thread, then it's way more involved then a blender throwing the recipe together. That's what you may see ... but that's not the whole story.
Blender simply throws the recipe together. Afton, Infineum, Lubrizol, Oronite, etc. has already done the testing to confirm that the final receipt will pass.