Diesel Hybrid School Bus & Truck Manufacturer to Accept Blue Sky Award(TM) in Pasadena, Display Clean, Fuel-Efficient Real-World Technologies

LOS ANGELES, Sept. 4 /PRNewswire/ — The following release is being issued by Navistar International Corporation:

   Why:   Innovations in diesel technology during the past decade have          reduced key emissions from new school buses, delivery and utility          trucks by more than 90%. WestStart-CALSTART, the nation’s leading          advanced transportation technologies consortium, recently announced          Navistar International Corporation as the recipient of the          organization’s 2007 Blue Sky Award for its contributions to the          commercial development of diesel-hybrid technology.           With the recent approval of the California state budget,          legislators can now establish criteria for spending $200 million in          transportation money to reduce emissions from school bus fleets,          approved by voters last fall through Proposition 1B.           Diesel hybrids offer the most advanced alternative for progressive          school districts looking to modernize their fleet. By combining a          certified clean diesel engine with an electric system that recovers          energy during braking, hybrid school buses deliver up to 70%-100%          better fuel economy and 30%-60% lower greenhouse gas emissions          compared to conventional buses. They provide policymakers and          business owners an attractive option for meeting the state’s energy          efficiency, clean air and climate change goals.    What:  Navistar International Corporation, a leading truck and engine          producer, is the recipient of the prestigious 2007 Blue Sky Award          from WestStart-CALSTART for its contributions to the commercial          development of diesel-hybrid technology. The company will display          its Green Diesel Hybrid(TM) school bus and a diesel-hybrid truck.          Experts will be available to discuss the technology, provide a          hands-on tour of the powertrain, and explain its benefits.    Who:   Tom Cellitti, Vice President and General Manager, Medium Truck            Vehicle Center          Michael Cancelliere, Vice President and General Manager, IC            Corporation          Patrick Charbonneau, Vice President, Government Relations    When:  Thursday, September 6, 2007          9:00 a.m. – 11:30 a.m.          Awards luncheon immediately following; please RSVP to ensure          appropriate seating    Where: The Athenaeum on the campus of the California Institute of          Technology          551 S. Hill Avenue          Pasadena, CA 91106   

About Navistar: Navistar International Corporation (BULLETIN BOARD: NAVZ) is a holding company whose wholly owned subsidiaries produce International(R) brand commercial trucks, MaxxForce brand diesel engines, IC brand school buses, and Workhorse brand chassis for motor homes and step vans. It also is a private-label designer and manufacturer of diesel engines for the pickup truck, van and SUV markets. The company also provides truck and diesel engine parts and service. Another wholly owned subsidiary offers financing services. Additional information is available at: http://www.navistar.com/.

Navistar International Corporation

CONTACT: Julie Fidler, +1-202-276-7314, for Navistar InternationalCorporation; or Tim Touhy of Navistar International Corporation,+1-630-753-3869

Web site: http://www.navistar.com/