Navistar will move from EGR and adopt the SCR path taken by its competitors to meet 2010 diesel emissions regulations.
Diesel Technology Forum research found that advancements in clean diesel technology have brought emissions to nearly zero.
The original guidance required engine performance to be degraded after a truck travels 2,000 miles or 40 hours on an empty DEF tank
Heavy truck demand for 2010 is likely to slow after 2007 engine inventory is exhausted.
The EPA is seeking a 60-day stay of the lawsuit filed by Navistar challenging the agency's guidance to truck and engine makers that are using selective catalytic reduction to achieve 2010 emissions standards.
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