Ok Al, Here is my thoughts and recommendations about the 132 ep additive treatment..
It is thick like STP oil treatment, So I would never advise anyone to use it in every oil drain as I have tried it and found if you do that, it will produce a much heavier oil from excessive residual and cause the oil flow properties not to flow as designed until it warms up. That is the downside.
The upside... Everything it states on the techdata sheet is true from what I've seen. It produces some excellent results with the above drawback.
If memory serves, some on edmunds ordered some and should be able to express their opinions as well.
Schaeffers does not make any other full synth motor oil and the one you mentioned is not an api certified oil. I personally have never sold one drop of Schaeffers full synth oil as in all my experiences with Schaeffers blends, they have perfomed exceptionally well in wear protection as well as extended drains and has been proven from actual real time applications experiences, crossing from farming industry to heavy industrial equipment well over the last 50+yrs with the use of analysis..
I know it's a real hard thing for many to believe that a blend could actually do as well as it does but as many are finding out for themselves through actuall use and analysis it is possible.