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One silver lining in the financial storm of the past year or so had been a steep decline in the price of oil generally and diesel fuel in particular.

Biodiesel producers are threatening to shut down their operations if the Senate does not approve a bill that would extend the $1 per gallon biodiesel tax credit due to expire Dec. 31.

Beginning Jan. 1, officials at the Southern California sister ports of Los Angeles and Long Beach will face yet another challenge as they begin the second phase of their clean trucks plans: fewer trucks.

Commercial vehicle Group said it will close its Norwalk, Ohio, truck cab plant due to Navistar Inc.'s decision to assemble cabs for its own trucks.

Today’s new diesel-power trucks are, by law, equipped with particulate filters, and in many models the DPF will soon will be joined by another aftertreatment device — selective catalytic reduction, or SCR, in a canister.

Donaldson Co., a manufacturer of filtration systems, said Monday it is spending $5 million to enable one of its plants to manufacture parts that comply with the Environmental Protection Agency’s 2010 diesel emission standards.

The California Air Resources Board last week began to look into changing the state’s diesel emissions rule, which could give truckers hit by the recession more “flexibility” or even partial delays of one or two years in complying.

The U.S. Environmental Protection Agency last week declared that greenhouse gas emissions from vehicles and industrial facilities are a danger to human health, a first step the agency must take along the path to regulations limiting the levels of combustion by-products from tailpipes.