I didn't get the opinion that u were trying to save money. I felt that you were trying to find a good compromise of the best
oil in conjunction with high ZDDP.
My point was that u can find the very best
oil out there (your choice) and then add the ZDDP to give the the best of all worlds. I don't have the specific knowledge to agrue your point about the blending method, but I am highly skeptical as the ZDDP comes already mixed in some
oil. Who knows
.