IIRC no new refineries have been built in North America for 40+ years.
This has been bandied about for years, but it isn't technically true. There are different types of refineries. Several "upgrader" type refineries have been recently constructed in Alberta, for example, but they don't refine bitumen into gasoline, diesel, etc. They upgrade the bitumen into crude, which is easier to handle, and then transported to customers.
The last BIG new refinery came online in the 70's. Several smaller refineries have come online more recently, but they are very small or highly specialized (i.e. there's a new one in Houston listed here that refines natural gas condensate into liquid products like LPG). https://www.eia.gov/...q.cfm?id=29&t=6
There was also one small refinery built in North Dakota that was built to produce pretty much only diesel. That one's kind of an interesting story.
So, it's not technically a true statement, but true enough.
We also can't overlook that virtually every refinery has been significantly upgraded over the years to increase capacity, become more efficient, become cleaner, etc. New processes, like cat cracking, have come along too that have been added to many refinery operations as well.
If Alberta had more vision than a mole they would have encouraged/supported a refinery in Fort Mac. Jobs created and no "dilbit" sludge moving through pipelines.
IIRC2, Canadian oil price is blended to reflect Cdn costs and imported costs and arrive at a kind of median price.
A whole lot of oil for eastern Canada is brought in from Venezuela which is relatively close but very dirty high-sulphur oil. My friend's dad worked on those tankers and east end Montreal had several refineries when I was a kid. We always knew when the wind had shifted!
It's a shame that they burn corrupt, bloody Saudi and Venezuelan oil in central and eastern Canada. We help make the sheikhs and dictators rich while laughing at our own out of work oilpatch workers.