Well in truth, it was mostly group III PP and I went a bit too long on ODI sometimes by following the OLM to 0%. I figured the OLM was calibrated to petro and I could get away with it using at least a group III. I think that was true in terms of wear, but not cleanliness. And as I've posted, I've come to believe that cleanliness is actually the more important thing in a modern engine.
VRP is the right oil at the right time for the needs of many of today's engines. IMO.