This product is unlikely to damage your engine.
That may not be true. I'm not saying that it will, I've never heard of the stuff, but with oil temps running in the 300?+ range and much hotter for the oil trapped in the engine during shutdown, any additives that cannot withstand this heat could do serious damage.
OP, hunter, if you decide to try this product, watch your oil very closely. If it gets dark quickly, change it immediately, that is a sign that it is breaking down and contaminating your oil