UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K
                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
                        Date of Report: February 19, 2008


                             MOMENTUM BIOFUELS, INC.
                      (Formerly Tonga Capital Corporation)
                      ------------------------------------
             (Exact name of registrant as specified in its charter)


                                                                                  


              Colorado                                  000-50619                               84-1069035
- -------------------------------------             ----------------------             ---------------------------------
  (State or other jurisdiction of                   (Commission File                   (IRS Employer Identification
           incorporation)                                Number)                                 Number)



              2600 S. Shore Blvd, Suite 100, League City, TX 77573
              ----------------------------------------------------
               (Address of Principal Executive Offices) (Zip Code)



                                 (281) 334-5161
                                 --------------
               Registrant's telephone number, including area code



         Check the  appropriate  box below if the Form 8-K filing is intended to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:


[    ] Written communications  pursuant to Rule 425 under the Securities Act (17
     CFR 230.425)

[    ]  Soliciting  material  pursuant to Rule 14a-12 under the Exchange Act (17
     CFR 240.14a-12)

[    ]  Pre-commencement  communications  pursuant  to Rule  14d-2(b)  under the
     Exchange Act (17 CFR 240.14d-2(b))

[    ]  Pre-commencement  communications  pursuant  to Rule  13e-4(c)  under the
     Exchange Act (17 CFR 240.13e-4(c))








                            SECTION 8 - OTHER EVENTS

ITEM 8.01  OTHER EVENTS.

Payment of Promissory Note

On January 11, 2008, Momentum Biofuels,  Inc. ("the Company") made final payment
on the outstanding  $400,000  promissory  note held by Ultimate  Investment Corp
("Ultimate").  The  promissory  note had an issue date of June 30,  2006 and had
been  accruing  interest at a rate of 12% per annum,  at the default  rate.  The
final payment was $319,792, cash, including accrued interest of $3,901.

The  promissory  note had an original due date of September  29, 2006.  In April
2007,  the Company  entered into a Forebearance  Agreement with Ultimate,  which
extended the due date to December 31,  2007.  Ultimate  agreed to extend the due
date to January 15, 2008.









                                   SIGNATURES

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  Registrant  has duly  caused  this Report to be signed on its behalf by the
undersigned, hereunto duly authorized.



                             MOMENTUM BIOFUELS, INC.


                        By:/s/ Gregory A. Enders
                        ------------------------
                               Gregory A. Enders, President and
                               Chief Executive Officer


 Date: February 21, 2008