X2. Back when I was in college and we were three sheets to the wind, needing more beer and unable to taste what we were drinking, we'd go buy Schaeffer beer because.......it was cheap.
The beer I know. That stuff was harsh going down.
The biggest question is why? With several synthetics that have more than proven themselves over the years, what will it do over the others? Amsoil, Royal Purple, Redline, and of course Mobil 1 just to name a few, would be my choice unless there is something specific in Schaeffer's that the 6.4 needs.