It seems that Canada has a lower price for Mobile 1 but a higher price for dino oil. Or the difference between Mobile 1 and dino is not as big as in the US.
My local Wal-Mart (Big Rapids, MI) has Mobile 1 at $4.24 - $4.49 per quart. When the 5-qt special bottles come in, it is for $17.88.
Most dino oils (Castrol, Vavoline, Pennzoil, Quaker State, Havoline, etc) are from $1.25 - $1.50 per quart. When the special 5-qt or 6 qt bottles come in, they are about $1 per qt. I can always get for that price. For example, this week, K-Mart has the Havoline for $0.98 per qt.