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Record diesel prices are driving on-highway trucking customers to look for every edge to curb fuel costs, beginning with their choice of truck. Navistar today released definitive results of extensive testing confirming that the International® ProStar™ is the most aerodynamic and fuel-efficient Class 8 truck on the road.

Recent tests demonstrate that the International ProStar is 7.3 percent more aerodynamic and 7 percent more fuel-efficient than Freightliner’s Cascadia, ProStar’s closest competitor. Overcoming aerodynamic resistance is particularly important for on-highway trucks, as is a fuel-efficient power train.

This margin of leadership translates into substantial savings. Whether operated as part of a company’s fleet of trucks or by an owner-operator, Class 8 trucks rack up a lot of highway miles each year consuming large amounts of diesel fuel. At 120,000 miles a year, each ProStar can save approximately $5,800 annually in fuel over its nearest competitor.

“Clear and decisive fuel-economy leadership is great news for our customers,” said Daniel C. Ustian, Navistar chairman, president and chief executive officer. “The ability to save thousands of dollars in fuel with one truck over the course of a year is extremely significant, especially with the financial pressures placed on truck and fleet owners.”

Navistar is leading the industry in conducting and publishing ongoing testing results so its customers can benefit from fuel-economy savings. 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.