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The national average price of diesel ended its five-week run of declines by skyrocketing 38.8 cents to $5.224 a gallon, according to Energy Information Administration data on Oct. 10.

Biodiesel is getting a boost from new government incentives as city fleet owners are using it to quickly lower truck emissions.

The Treasury Department is expediting the formulation of scores of regulations that will carry out the $270 billion worth of energy tax incentives included in President Joe Biden’s signature climate and tax bill.

Michigan awarded incentives to two new battery projects — a local startup building a cell plant and a Chinese firm that may produce battery components — as Gov. Gretchen Whitmer seeks to secure future automotive jobs in the state.

President Joe Biden called plans by OPEC+ to cut output targets by 2 million barrels a day “unnecessary,” and the White House said more releases from U.S. petroleum reserves are possible.

Drivers in Georgia and Florida are getting some price relief at the pump, as supply chain- and inflation-related fuel-tax holidays are being extended while both states grapple in their own ways with the aftermath of Hurricane Ian.

The recent introduction of the Navistar S13 engine with no EGR cooler and much less reliance on any form of EGR is remarkable.

Nikola Corp. founder Trevor Milton said he wouldn’t take the witness stand in his criminal fraud trial, as the defense prepares to rest its case.

WASHINGTON — President Joe Biden, a self-described “car guy,’’ often promises to lead by example on climate change by moving swiftly to convert the sprawling U.S. government fleet to zero-emission electric vehicles. But efforts to eliminate gas-powered vehicles from the fleet have lagged.