Exhibit 4.4    

CONSENT OF BLAKE, CASSELS & GRAYDON LLP

Dated: February 22, 2016

We hereby consent to the references to our firm under the heading “Legal Matters” and our firm and opinion under the heading “Certain Canadian Federal Income Tax Considerations” in each case in the Circular that forms a part of the Registration Statement on Form F-80 dated February 22, 2016 filed by Suncor Energy Inc. under the Securities Act of 1933, as amended (the “Act”). In giving this consent, we do not thereby admit that we come within the category of persons whose consent is required by the Act or the rules thereunder.

Yours truly,

  /s/ Blake, Cassels & Graydon LLP

   BLAKE, CASSELS & GRAYDON LLP