I just wanted to know what people think, so I have give good advice to a neighbor. They used to have (at least in the past) this Krex additive at Saturn dealerships (or at least at a couple of Saturn dealerships).
My guess is that there is no need for this additive, since modern oils nave Moly anyway. And maybe even the Moly would conflict with the graphite.
Personally myself, the only oil additives I believe in are Auto-RX and maybe Neutra in the oil to clean it.