I see alot of threads about how Valvoline Maxlife Sythetic Blend is a good oil because it has a lot of PAO in it. I am curious about the difference between the full synthetic and the synthetic blend. I was told by the Valvoline rep that their full sythetic was group 3. Does that mean it has no PAO in it like the blend does? If that is the case, in theory wouldnt their blend protect better than their full synthetic?