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A notice from the U.S. Environmental Protection Agency to revisit parts of the Phase 2 final rule on greenhouse gas emissions from heavy- and medium-duty trucks isn’t likely to create changes quickly, as the agency has not presented plans for expedited action and environmental groups are vowing to pursue a challenge in a federal appeals court — once the case is no longer being held in abeyance.

DALLAS — Hurricane Harvey is sending pump prices higher for U.S. motorists and causing temporary shifts in the flow of oil and gasoline around the world after taking down a huge chunk of U.S. refining capacity.

Parked east of the California Capitol steps was a long line of vehicles as clean as they were large, including a yellow school bus, a UPS delivery truck and an AC Transit bus — all with electric or hybrid motors.

Comments on a plan by the Trump administration to halt the future growth of biomass-based diesel fuel and reduce the short-term requirements for all renewable fuels were largely split down the middle, pro and con.

COLUMBUS, Ind. — Cummins Inc. has unveiled a concept truck with an all-electric powertrain, highlighting the diesel engine manufacturer’s commitment to electric power as an important part of its future.

The U.S. average retail price of diesel rose 0.9 cent to $2.605 a gallon as Hurricane Harvey wound down to a tropical storm after it disrupted oil production platforms and fuel refineries along the Gulf Coast of Texas before inundating Houston.

Massive flooding caused by Tropical Storm Harvey along Texas’ refinery-rich coast could have long-standing and far-reaching consequences for the state’s oil and gas industry and the larger U.S. economy.

More than four years after an FBI raid on the headquarters of Pilot Flying J, the exhaustive investigation into a diesel fuel rebate fraud could be nearing its end come Oct. 31.

It could be years before drivers on U.S. highways catch a glimpse of a tractor-trailer rig cruising down the highway with another truck trailing a perilous 20 or 30 feet behind.