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                                                                    EXHIBIT 23-6

                 [QUESTA ENGINEERING CORPORATION LETTERHEAD]


February 24, 1998



MCN Energy Group Inc.
500 Griswold
Detroit, Michigan 48226

RE:  MCN Energy Group Inc.
     1997 Annual Report on Form 10-K


Ladies and Gentlemen:

The firm of Questa Engineering Corporation consents to the use of its name and
the information contained in this report dated January 6, 1998, regarding MCN
Energy Group Inc.'s oil and gas reserve information as of December 31, 1997 in
its 1997 Annual Report on Form 10-K.

In addition, Questa Engineering Corporation consents to the incorporation by
reference of said material in Registration Statement Nos. 333-02105 and
333-02107 on Form S-8, 333-01523, 333-21175 and 333-45281 on Form S-3 and Post
Effective Amendment No. 1 to Registration Statement No. 33-21930-99 on Form S-8
of MCN Energy Group Inc.

Questa Engineering Corporation has no interest in MCN Energy Group Inc. or in
any affiliated companies or subsidiaries and is not to receive such interest as
payment for such reports and has no director, officer, or employee otherwise
connected with MCN Energy Group Inc.  We are not employed by MCN Energy Group 
Inc. on a contingent basis.

Very truly yours,
QUESTA ENGINEERING CORPORATION

/s/ Dave O. Cox
    Dave O. Cox, Vice President