EXHIBIT 99.4
                                                                    ------------


In connection with the Annual Report of Western Oil Sands Ltd. (the "Company")
on Form 40-F for the period ended December 31, 2002 (the "Report") to which this
certificate is an exhibit, I, Guy J. Turcotte, President and Chief Executive
Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, as
adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.       The Report fully complies with the requirements of Section 13(a) or
         15(d) of the Securities Exchange Act of 1934; and

2.       The information contained in the Report fairly presents, in all
         material respects, the financial condition and results of operations of
         the Company.


Date:  May 9, 2003                              /s/ Guy J. Turcotte
                                                -------------------------------
                                                Guy J. Turcotte
                                                President and Chief Executive
                                                Officer





A signed original of this written statement required by Section 906 has been
provided to Western Oil Sands Inc. and will be retained by Western Oil Sands
Inc. and furnished to the Securities and Exchange Commission or its staff upon
request.