ADVISORY/Media Alert: International Truck and Engine Corporation and EPA Announce Clean Diesel Combustion; Event Date: Thursday, May 13, 2004.

Business Editors/Automotive Writers

ADVISORY...for Thursday (May 13)

--(BUSINESS WIRE)

Who:      U.S. Environmental Protection Agency
          Administrator Mike Leavitt
          and
          Navistar International Corporation
          Chairman, President and Chief Executive Officer
          Daniel C. Ustian

What:     A press conference announcing the testing and development
          partnership between the EPA and International Truck and
          Engine Corporation concerning EPA's Clean Diesel Combustion
          (CDC) technology for low-emission diesel engines. This
          technology potentially will:
          --  Further the viability of diesel engines in passenger
              vehicles with near-zero emissions.
          --  Yield cost-effective light-duty and heavy-duty diesel
              power without NOx aftertreatment systems.
          --  Create additional skilled jobs in the U.S. diesel
              engine industry.

Why:      In 2007 and 2010 EPA standards will mandate that all
          on-highway diesel engines must achieve near-zero NOx
          emissions. Learn how CDC technology not only will help to
          meet these mandates but further increase the viability of
          clean diesel technology in light-duty and heavy-duty
          commercial and consumer vehicles like SUVs and passenger
          cars.

          The performance benefits of diesel are proven. With CDC,
          diesel power will solidify its bright future as the
          environmental and cost-effective choice in all types of
          vehicles.

Where:    International Truck and Engine Corporation
          Engine Plant and Technical Center
          10400 W. North Ave.
          Melrose Park, IL 60160
          *Enter at main entrance

          Conference Call Option
          Dial-In: 1-888-857-6929
          Confirmation Code: 244267
          (title: International Truck and Engine Corp. Visit)

When:     Thursday, May 13, 2004, 9 a.m. CDT (10 a.m. EDT)

Speakers: --  Mike Leavitt, Administrator, U.S. Environmental
              Protection Agency
          --  Daniel C. Ustian, Chairman, President and Chief
              Executive Officer, Navistar International Corporation
              (parent company of International Truck and Engine
              Corporation)
          --  Jack Allen, President, Engine Group,
              International Truck and Engine Corporation
          --  Patrick Charbonneau, Vice President, Regulatory and
              Technology Affairs, International Truck and Engine
              Corporation

          To RSVP and for directions to the press conference, please
          contact Rachel Lukawski at [phone] or
          [e-mail].