CERTIFICATION
                       PURSUANT TO 18 U.S.C. SECTION 1350,
                    AS ADOPTED PURSUANT TO SECTION 906 OF THE
                           SARBANES-OXLEY ACT OF 2002


          The undersigned hereby certify, pursuant to 18 U.S.C. Section 1350, as
     adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to
     the undersigned's  best knowledge and belief,  the Quarterly Report on Form
     10-Q  for  the  Geodyne   Institutional/Pension   Energy   Income   Limited
     Partnership  P-5  ("Issuer")  for the period  ending  September 30, 2005 as
     filed with the Securities  and Exchange  Commission on the date hereof (the
     "Report"):

      (a)   fully complies with the requirements of section 13(a) or 15(d) of
            the Securities Exchange Act of 1934; and
      (b)   the  information  contained in the Report  fairly  presents,  in all
            material respects, the financial condition and results of operations
            of the Issuer.

      Dated this 14th day of November, 2005.

                                    GEODYNE INSTITUTIONAL/PENSION ENERGY
                                    INCOME LIMITED PARTNERSHIP P-5
                                    ("Issuer")

                                    //s// Dennis R. Neill
                                    -----------------------------------
                                    Dennis R. Neill
                                    President (Chief Executive Officer)

                                    //s// Craig D. Loseke
                                    -----------------------------------
                                    Craig D. Loseke
                                    Chief Accounting Officer
                                    (Chief Financial Officer)


     A signed  original of this  written  statement  required by Section 906 has
been   furnished  to  Geodyne   Institutional/Pension   Energy  Income   Limited
Partnership P-5 and  will be retained  by Geodyne  Institutional/Pension  Energy
Income  Limited  Partnership  P-5 and furnished to the  Securities  and Exchange
Commission or its staff upon request.