Filed by USX Corporation
                           Pursuant to Rule 425 under the Securities Act of 1933
                                        And deemed filed pursuant to Rule 14a-12
                                          Of the Securities Exchange Act of 1934
                                               Subject Company:  USX Corporation
                                                      Commission File No. 1-5153

Marathon and YUKOS to form a strategic alliance for international growth

HOUSTON/MOSCOW, August 23, 2001 - Marathon Oil Company, part of the USX-Marathon
Group  (NYSE:  MRO)  and  a  unit  of USX Corporation,  and  YUKOS  Oil  Company
(RTS:YUKO), the second largest Russian oil company, announced today their  plans
to  develop  a  strategic alliance. Both companies are  looking  to  grow  their
respective  international businesses and the alliance is  expected  to  consider
joint  energy  investments in different parts of the  world.   As  part  of  the
alliance  a joint business development group is planned to be located in  London
to evaluate international investment opportunities.

"The  alliance should create a strategic business relationship with an  industry
leader  that  shares  our  ambitions for international  growth,"  said  Clarence
Cazalot,  president of Marathon Oil Company.  "An integral part of our  strategy
is to develop profitable new core areas in participation with important national
oil  companies and growth-oriented international players. This proposed alliance
with YUKOS is evidence of that strategy as it brings together two companies with
complementary technical skills and international relationships.  Furthermore, we
anticipate that this relationship could lead to investment by Marathon in energy
opportunities in Russia."
YUKOS'  CEO  Mikhail Khodorkovsky said, "The planned alliance with  Marathon  is
aimed at expansion of our international business and is an important step in our
strategy  of  becoming  a leading international energy  company.  We  intend  to
establish mutually beneficial relations with Marathon and these relations, after
the  corresponding agreements are signed, will become an important factor in the
successful development of the international operations of both companies. "

Marathon Oil Company, part of the USX-Marathon Group (NYSE: MRO) and a  unit  of
USX  Corporation, is a large fully integrated oil firm engaged in the  worldwide
exploration  and  production  of  crude oil and natural  gas.  Through  Marathon
Ashland  Petroleum  LLC,  the  Company  also  refines,  markets  and  transports
petroleum products in the United States.

Headquartered in Moscow, YUKOS is one of Russia's largest publicly traded, fully
integrated petroleum companies. Through its upstream and downstream divisions,
YUKOS EP and YUKOS RM, YUKOS is involved in every aspect of the oil industry,
from the well head to the filling station. In 2000, the Company reported
reserves of 12.2 billion barrels of oil equivalent and average production of
around 990,000 barrels of oil per day.

This news release contains forward-looking statements concerning the planned
alliance and the potential for future investment, as well as the future benefits
which may be realized from such an alliance.  The successful completion of the
alliance and any related transaction depends upon the execution and closing of a
definitive agreement, and the receipt of government and other third party
approvals. The realization of anticipated benefits is dependent upon the
effectiveness of the mutual alliance and future economic conditions.  In
accordance with "safe harbor" provisions of the Private Securities Litigation
Reform Act of 1995, USX has included in Form 10-K for the year ended December
31, 2000, in Form 10-Q for the quarter ended June 30, 2001, and in subsequent
Form 8-K's, cautionary language identifying other important factors, though not
necessarily all such factors, that could cause future outcomes to differ from
those set forth in forward-looking statements.