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Truck and engine maker Navistar Inc. said it will take a “leadership role” in trying to convince Congress and the new administration to delay full implementation of 2010 heavy-duty truck engine emission mandates.

Navistar International Corp. will use federal emission credits to enable its new Class 8 engine to meet 2010 federal emission standards, although the engine could be set up to comply with the regulation without the credits, a Navistar executive said.

Pacer International announced last week that its subsidiaries will deploy 230 new clean trucks this month to comply with Southern California port regulations.

FORT LAUDERDALE, Fla. — ABF Freight System will use diesel engines with selective catalytic reduction technology starting in 2010, but the less-than-truckload carrier has not decided upon the truck maker it will use.

The average price of U.S. retail diesel fuel continued to slide last week, falling 13.5 cents a gallon to a 17-month low of $2.809, the Department of Energy reported.

Reversing Bush administration policies, including its denial of California’s request for a waiver allowing the state to regulate automobile greenhouse-gas emissions, could be high on President-elect Barack Obama’s agenda in January, some observers said.

Adding biodiesel to Canada’s existing fuel storage, blending and distribution infrastructure could spur a host of problems for the country's distillate market, the Canadian Trucking Association said.