WARRENVILLE, IL – Navistar has released results of extensive testing confirming that the International ProStar is the most aerodynamic and fuel-efficient Class 8 truck on the road, the company said. Recent tests demonstrate that the International ProStar is 7.3 percent more aerodynamic and seven percent more fuel-efficient than Freightliner’s Cascadia, ProStar’s closest competitor. Navistar’s researched revealed that at 120,000 miles a year, each ProStar can save approximately $5,800 annually in fuel over its nearest competitor.

Navistar is conducting and publishing ongoing testing results. Both over-the-road and wind tunnel tests use rigorous TMC and SAE testing procedures, regarded as the highest standards of testing in the transportation industry. Wind tunnel tests were conducted at the National Research Council Institute for Aerospace Research in Canada utilizing SAE J1252 wind tunnel testing practices.

Navistar estimates that the International ProStar’s aerodynamic design can save 1,400 gallons of fuel annually per truck over competitive aero trucks (based on 20,000 gallons of fuel used per year and seven percent fuel savings; 120,000 miles per year at a six mpg baseline). At the national average price of diesel ($4.15 as of May 7, 2008), saving 1,400 gallons of fuel would save each customer about $5,800 per truck annually.