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EXHIBIT 5.5

Consent of Sproule Associates Limited and Sproule International Limited

LETTER OF CONSENT

TO: Suncor Energy Inc.
The Securities and Exchange Commission

Re: Suncor Energy Inc.

Dear Sirs,

We refer to the following reports (the "Reports") prepared by Sproule Associates Limited and Sproule International Limited:

•

Evaluation of the P&NG Reserves of Suncor Energy Inc. in the Newfoundland Offshore Areas dated February 19, 2016;

•

Evaluation of the P&NG Reserves of Suncor Energy Inc. in the North America Onshore Properties dated February 19, 2016;

•

Evaluation of the P&NG Reserves of Suncor Energy Inc., North Sea Properties dated February 19, 2016; and

•

Evaluation of the P&NG Reserves of Suncor Energy Inc., Libya Properties dated February 19, 2016,

which provide our reports on proved and probable reserves evaluations pursuant to Canadian disclosure requirements of Suncor Energy Inc.'s Canadian onshore and offshore conventional assets and international operations that were evaluated as at December 31, 2015.

We hereby consent to being named and to the use of, reference to and excerpts and information derived from the said Reports by Suncor Energy Inc. in its Registration Statement on Form F-10, dated as of June 7, 2016 (the "Registration Statement"), and any amendments thereto. We hereby also consent to the reference to our firm under the heading "Experts".

Yours truly,

SPROULE ASSOCIATES LIMITED
SPROULE INTERNATIONAL LIMITED

/s/ Scott W. Pennell, P. Eng.

Scott W. Pennell, P. Eng.
Vice-President, Engineering and Director

Calgary, Alberta
June 7, 2016

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EXHIBIT 5.5

Consent of Sproule Associates Limited and Sproule International Limited LETTER OF CONSENT