Is this BOQI index model really no more than a tautology?
Most of us are aware that lower than typical NOACK within a grade along with outstandingly low CCV within that same grade can reasonably be viewed as indications of a higher quality basestock blend, while those oils that brush the limits for both can reasonably be viewed as using a lower quality basestock blend.
Is the BOQI model no more than a seemingly meaningful way of restating the obvious?
Even if this is true, Gokhan has still done us a great service in finding and aggregating the numbers for a large group of oils in tabular format.