EXHIBIT 31.1

   CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
                 SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002



       I, Murray N. Conradie, certify that:

       1. I  have  reviewed this quarterly report on Form 10-QSB of South Texas
Oil Company.;

       2. Based on my  knowledge,  this  quarterly  report does not contain any
untrue statement of a material fact or omit to state  a material fact necessary
to  make the statements made, in light of the circumstances  under  which  such
statements were made, not misleading with respect to the period covered by this
report;

       3. Based  on my knowledge, the financial statements, and other financial
information included  in  this  report, fairly present in all material respects
the  financial  condition,  results  of  operations,  and  cash  flows  of  the
registrant as of, and for, the periods presented in this report;

       4. I am responsible for establishing and maintaining disclosure controls
and procedures (as defined in  Exchange  Act Rules 13a-15(e) and 15d-15(e)) for
the registrant and have:

       a) Designed such disclosure controls  and  procedures,  or  caused  such
disclosure  controls  and  procedures  to  be designed under my supervision, to
ensure  that material information relating to  the  registrant,  including  its
consolidated subsidiaries, is made known to me by others within those entities,
particularly  during  the  period  in  which  this  quarterly  report  is being
prepared;

       b) Evaluated  the  effectiveness of the registrant's disclosure controls
and  procedures  and  presented   in  this  report  my  conclusions  about  the
effectiveness of the disclosure controls  and  procedures  as of the end of the
period covered by this report based on such evaluation; and

       c) Disclosed  in  this  report  any change in the registrant's  internal
control over financial reporting that occurred  during  the  registrant's  most
recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an
annual  report)  that  has  materially  affected,  or  is  reasonably likely to
materially affect, the registrant's internal control over financial  reporting;
and

       5. I  have  disclosed,  based  on our most recent evaluation of internal
control over financial reporting, to the  registrant's  auditors  and the audit
committee  of  the  registrant's board of directors (or persons performing  the
equivalent functions):

       a) All significant deficiencies and material weaknesses in the design or
operation of internal  control  over  financial  reporting which are reasonably
likely  to  adversely  affect  the  registrant's ability  to  record,  process,
summarize, and report financial information; and

       b) Any fraud, whether or not material, that involves management or other
employees who have a significant role in the registrant's internal control over
financial reporting.





                                  /s/ Murray N. Conradie
                                  ----------------------
                                  Murray N. Conradie,
                                  President, Chairman and Director
                                  (Principal Executive Officer)
Date: August 20, 2007