Sheesh. I didn't see that $6.89/L special, and I usually pay attention. That's a nice price. The PU certainly was on its way out up here before it even got properly stocked. Clevy has mentioned it being at NAPA before, and I've heard that elsewhere. He's also seen it at a Shell station up in Saskatoon. As for NAPA, they're kind of hit and miss with pricing. When they have a synthetic on sale, they'll beat Walmart rollbacks. When it's not on sale, look out. Oddly enough, Clevy mentioned that NAPA up here has Eneos at a semi-sensible price, at least by Canadian standards.
The one Walmart near one of my businesses still has all the old SM/GF-4 Edge with Titanium. It's simply not moving. If you're going to roll back PP and QSUD and Synpower and regular Syntec to $19.99 a jug, you're not going to move $14 a litre synthetic.