While eastern Canada is still importing oil mostly from the US now the amount of imports is declining due to importation of western Canadian crude which is getting to eastern markets by RAIL.

BTW our oil is sold at a discount while the US oil is at world prices. 

https://www.neb-one.gc.ca/nrg/ntgrtd/mrkt/snpsht/2014/11-01lmprt-eng.html