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Cokers are the key to Canadian heavies (Cold Lake, Lloydminster, etc). I noticed that three new units were coming on line besides the upgrade/expansion of existing cokers. One was at Cenex/Laurel, a small refinery, but significant when you consider its a coop and a new coker is quite expensive.

I am not as versed with Canadian or heavy oil refining as I should be. As you know most US refineries have used strictly light crude. I will brush up. But not so long ago I can remember shutting in sour oil and walking away because their was no market. Hopefully shale oil production can be increased to a million barrels a day in the near future. That would off set the declining production of light crude.

The oil sands syncrude is shipped without bottoms so it really is the replacement for light bbls.
Most of the northern tier refineries are running some Canadian heavy, especially at a $25/bbl discount off WTI, which is a huge incentive. Some of the northern refineries are already doing asphalt winterfill for next spring's paving season.