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Two new low-viscosity oil lubricants set to come onto the market, CK-4 and FA-4, will improve fuel efficiency in heavy-duty trucks between 0.5% and 1.5%, according to a new report from the North American Council for Freight Efficiency.

The U.S. retail diesel average price was unchanged at $2.426 after a 0.5-cent dip the prior week, the Department of Energy reported.

Siemens AG, based in Germany, opened the world’s first eHighway on June 22 in Sweden, which will use overhead catenary wires to power diesel trucks as a green alternative to traditional diesel fuel.

Gov. Kate Brown again called for a moratorium on oil trains in Oregon, after federal regulators released findings June 23 that blamed this month's fiery derailment and spill in the Columbia River Gorge on Union Pacific's failure to maintain its tracks.

U.S. drivers are burning gasoline at a record pace this summer as they take advantage of the lowest prices at the pump in more than a decade.

Oregon has asked the Federal Railroad Administration to place an open-ended moratorium on oil trains traveling through the state, because preliminary findings of an investigation into the June 3 derailment in Mosier suggest inspectors might not be able to detect the problem that likely caused the crash.

An advocacy group that wants more natural-gas vehicles on the road is praising a bill passed in Colorado, which Gov. John Hickenlooper recently signed.

Gasoline prices at U.S. pumps fell for the first time in four months, according to Lundberg Survey Inc.

The U.S. retail diesel average fell 0.5 cent to $2.426, the Department of Energy reported.

Volvo Group’s two North American truck making units, Mack and Volvo, said they are offering the option to link their remote diagnostic systems with communications services from Omnitracs with the goal of providing fleet managers with more information on safety and operations.