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Speakers and exhibitors at the 2025 Advanced Clean Transportation Expo illustrated a growing interest in cleaner-burning and renewable fuels for the internal combustion engine.

Mack Trucks pulled back the curtain April 29 on plans to launch a battery-electric version of the Volvo Group division’s recently unveiled flagship on-highway Class 8 tractor, the Pioneer.

The innovation of alternative fuels is poised to move forward, said Cummins CEO Jennifer Rumsey, despite uncertainty around regulations, incentives and trade policies.

Hyundai Motor Co. unveiled the latest iteration of its Class 8 Xcient hydrogen fuel cell electric tractor April 28, overhauling the powertrain, safety systems and driver comforts.

Volvo Trucks North America plans to launch a California Air Resources Board Omnibus rule-compliant diesel engine for its revamped longhaul and regional-haul tractors, the VNL and VNR.

Clarios has released a battery-monitoring technology, IdleLess, that provides real-time insights on heavy-duty vehicles while reducing fuel consumption and emissions.

The national average diesel price dipped 2 cents a gallon to $3.514, according to U.S. Energy Information Administration data released April 29.

Hydrogen trucks cost more than diesel models, but autonomous driving capabilities could double the utilization of those vehicles and improve the total cost of ownership calculation.

The new model is a battery-electric vehicle equipped with a gasoline-powered range extender that charges the battery when needed, enabling a range of up to 500 miles between charges.

Consumers across the U.S. still will be able to buy higher-ethanol blend E15 gas this summer, the EPA announced, saving them a little money at the pump but frustrating environmentalists.