to help extend the life of their engine by decreasing oil contamination from the intake tract to the combustion chamber.
I don't see how that would help prevent contamination of your oil becasue by the time the pvc is venting the excess pressure from the crankcase. The blowby has already occured and contamininated the oil some.
But it seems they are preaching about keeping oil out of your intake.
I myself have never noticed any amount of lost oil between oil changes in my bonneville to warent worrying about the oil contaminating my intake through the pcv.
If someone has a problem with oil consumption I think they should look else where for a fix before considering this.