[Evolved]

I see what part of what I said made you confused. The "unsustainable" part of what I meant was that it caused some sort of undesired effect be it affecting performance or causing accelerated wear on components that could be costly to replace under warranty or some other condition.

Either way, I agree, VW did this intentionally and there is no question as to their motives behind it. I'm sure they'll be severely punished for it.