Not to mention this:
https://www.neb-one.gc.ca/nrg/ntgrtd/mrkt/snpsht/2017/02-04cndncrlmprtsdcln-eng.html?=undefined&wbdisable=true

"Western Canadian crude oil imports, which are all from the U.S., increased 33% to 152 Mb/d in 2016. Most of this is attributable to increased imports of diluent, which is condensate (a natural gas liquid) or light oil that is mixed with oil sands bitumen to facilitate pipeline transport."

As for oil imports to refineries in eastern Canada in 2016, they WENT DOWN.