I ran it, came in a Superformance that I bought used.
It works as advertised, great on the system, no pressure leaks, water pumps like it, no corrosion and cools well.
It's messy and as previously indicated doesn't mix well with water. Changing cooling system components is more of a chore.
It's an
oil (thin hydraulic something) and it will cause the same problems on racetracks as engine
oil if it leaks.
It's not for me but I'm always opening something up.
I have friends that like it.
Jim