Major Canadian oil producers like Suncor, Canadian Natural Resources (CNRL), Cenovus, and Imperial Oil are key exporters of heavy oil (Western Canada Select) to the U.S., supplying refineries primarily in the Midwest and Gulf Coast, with pipelines like Enbridge, Keystone, and Express moving the bulk of this crude. These companies feed the U.S. market, which relies heavily on Canadian heavy crude for its specialized refineries, say EnergyNow.com and Canadian Energy Centre.
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