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IRVING, Texas — Exxon Mobil’s profit tumbled with crude prices down about 15% from where they were last year, though a $300 million boost from a tax-related item helped.

The Keystone crude pipeline was shut Oct. 30 after leaking thousands of barrels of crude in North Dakota, the third spill along the pipeline’s route in less than three years.

Canada’s beleaguered energy sector suffered another morale blow as Encana Corp. — one of its marquee companies that was born out of the 19th-century railway boom — announced plans to move its headquarters to the U.S. and drop the link to Canada from its name.

Marathon Petroleum Corp. buckled under pressure from shareholders and announced the spinoff of its retail fuel-station business and the departure of its chairman and chief executive officer, just five weeks after activist investor Elliott Management Corp. went public with demands for a radical overhaul of the company.

President Donald Trump’s effort to boost corn demand by allowing year-round sales of ethanol-blended gasoline has run into a logistical problem. Few stations offer it.

ATLANTA — Volvo Group CEO Martin Lundstedt said the commercial vehicle industry has entered a time of transition with the rise of electric-powered trucks, automated driving technology and connected vehicles.

Alberta took a step toward easing the pain of its crude-production caps by allowing oil companies to exceed output limits if they ship the extra production by rail.

ATLANTA — Donaldson Co. said recent tests show the Donaldson PowerCore filters can save fleets up to $215 per truck per year, because the filters provide 27% less restriction.

ATLANTA — Rocketail announced it will be making its two side wings, attached to improve a trailer’s aerodynamic flow, flexible upon contact.

Canadian carrier Mullen Group Ltd. posted a 6.4% decline in net income in the third quarter, to C$20.5 million or 20 cents per share, according to a company news release Oct. 24.