What: In light of record high diesel prices, Navistar, Inc. will announce major news tomorrow during a webcast. 

Why: Record high diesel prices are affecting trucking businesses and owner-operators across the country.

Who: Navistar Truck Executives

When: Wednesday, May 7, 2008, at 1 p.m. CDT

Where: Navistar Web Conference
Dial-in number 866.800.8648
Dial-in Passcode: 766 462 08
Webex Web conference link: https://ketchum.webex.com
Web conference meeting ID: 711820069
Web conference password: Navistar

About Navistar
Navistar International Corporation (Other OTC: NAVZ) is a holding company whose wholly owned subsidiaries produce International® 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 affiliate offers financing services. Additional information is available at www.Navistar.com.

CONTACT:
Dane Roth, Ketchum, 312-228-6843, Dane.Roth@Ketchum.com
Roy Wiley, Navistar, 630-753-2627, Roy.Wiley@Navistar.com