Quaker State has zero PAO (Group IV) in it. Pour Point is not a valuable metric for determining cold flow, that's why CCS and MRV are used to determine suitability for the various Winter designations (0W, 5W, 10W...etc).
The Quaker State lube is likely blended with Shell's GTL bases, which do not have the same low pour points of PAO. However, they have less wax than regular Group III, so I suspect their pour point responds better to PPD's, which is why we see low pour points on the GTL based oils. PAO has no wax in it, so as a base, does not require PPD's to achieve its cold performance.