EXHIBIT 99.10
                                                                -------------
                                 FORM 52-109FT2

            CERTIFICATION OF INTERIM FILINGS DURING TRANSITION PERIOD



I, PETER A. HANRAHAN,  Vice  President  Finance and Chief  Financial  Officer of
Advantage Oil & Gas Ltd. certify that:

1.       I have reviewed the interim filings (as this term is defined in
         Multilateral Instrument 52-109 CERTIFICATION OF DISCLOSURE IN ISSUERS'
         ANNUAL AND INTERIM FILINGS) of Advantage Energy Income Fund, (the
         issuer) for the interim period ending JUNE 30, 2005;

2.       Based on my knowledge, the interim filings do not contain any untrue
         statement of a material fact or omit to state a material fact required
         to be stated or that is necessary to make a statement not misleading in
         light of the circumstances under which it was made, with respect to the
         period covered by the interim filings; and

3.       Based on my knowledge, the interim financial statements together with
         the other financial information included in the interim filings fairly
         present in all material respects the financial condition, results of
         operations and cash flows of the issuer, as of the date and for the
         periods presented in the interim filings.

Date: AUGUST 11, 2005

         "PETER MANRAHAN"
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PETER A. HANRAHAN
VICE PRESIDENT FINANCE AND CHIEF FINANCIAL OFFICER