From the MSDS:
"Specific Gravity: 1.35 @ 50° /25° C"
= Chlorinated hydrocarbon product. Been there, done that. Don't like the results. Snake oil.
If the additive is too stable it will not be a good EP agent since the chlorine needs to chemically react with the iron surface to work its magic. If it is a good EP agent, then it is too unstable as far as corrosion. Classic catch 22 for this type of additive.