The Environmental Protection Agency wants to change how diesel trucks respond when their emissions equipment runs out of ...

The U.S. House Subcommittee on Environment advanced legislation on July 14 that sponsors said will reduce engine shutdowns ...

On Thursday, the U.S. Environmental Protection Agency (EPA) released the following: Today, U.S. Environmental Protection ...

NATSO, representing truck stops and travel centers, and SIGMA: America's Leading Fuel Marketers, questioned the Environmental Protection Agency's (EPA's) proposal to fundamentally alter the regulatory ...

What's your view of EPA's emissions moves? OOIDA raised concerns over the EPA's decision to remove extended warranty ...

There's something almost comedic about regulators amending a rule for engines that don't exist yet. The heavy-duty NOx standards finalized back in December 2022 don't even take effect until model year ...

EPA has proposed ending diesel exhaust fluid-related engine derates, replacing the gradual dialing back of truck performance ...

Paccar will begin to update the software on trucks equipped with MX-11 and MX-13 engines following the Environmental ...

Environmental Protection Agency Administrator Lee Zeldin on July 9 announced a proposal to eliminate deratements caused by ...

The Environmental Protection Agency plans to stop requiring that diesel trucks automatically reduce power when their emissions exceed certain limits under a proposed rule that would also do away with ...

The Environmental Protection Agency on Thursday unveiled a proposal that, while leaving in place the actual emissions limits mandated in a 2023 final rule for model year 2027 engines, could put a ...

The EPA's proposed updates to heavy-duty vehicle NOx rules would eliminate mandatory engine deratements by MY2029, drawing ...