Ok, so ZDDP (according to lots of parties) over time, will wreck the cat, 02 sensor. Now, if you want an additive to carry the oil through times of thin/no film, Moly must be the answer to ZDDP, right? Does Moly hurt cats and 02 sensors? If not, and Moly is the answer to SM oil-boosting, where do you get an additive with JUST moly, and no ZDDP? Our favorite moly-boost is, I suppose, VSOT, but that also has a high ZDDP count. Finally, what about calcium and boron? Do they hurt cats and sensors? Thanks!