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DUBAI, United Arab Emirates — Global energy prices spiked Sept. 16 after a weekend attack on key oil facilities in Saudi Arabia caused the worst disruption to world supplies on record, an assault for which President Donald Trump warned that the U.S. was “locked and loaded” to respond.

First there was derision. Then mockery turned into admiration. Now a battle is unfolding between the most revered names in the automobile world, Porsche and Tesla Inc., on one of the world’s most challenging racetracks.

Gas prices could look a little different across county lines under legislation proposed in the Michigan House this week.

President Donald Trump has tentatively agreed to a plan for bolstering ethanol and biodiesel, amid pressure from Midwest U.S. senators who warned the president that without action, he risks votes in next year’s election.

DUBLIN, Va. — The next generation of the 13-liter turbo compound engine from Volvo Trucks North America offers improved fuel economy over the current model, the company announced.

The Trump administration has decided to advance a plan to strip California of its power to regulate greenhouse gas emissions from automobiles on its own.

WASHINGTON — As policymakers evaluate viable long-term approaches to fund the country’s transportation network, a trucking industry executive warned against relying on tolling.

Trump administration officials are set to consult with oil refiners and renewable fuel producers at the White House on Sept. 11, as they struggle to develop a final plan for bolstering corn-based ethanol and soy-based biodiesel.

TravelCenters of America Inc. plans to add a location in Salina, Utah, through a franchise agreement.

The oil services sector will contract in 2020 as producers cut spending in response to lower crude prices, ending three years of growth, according to Rystad Energy.