EPA's relaxed NOx rule, as many expected, removes the warranty extension—and proposes annihilating the troublesome DEF derate ...

Updated diesel engine software gives truck operators more time to address emissions-system issues while staying compliant ...

Cummins and Paccar are rolling out software updates tied to revised EPA guidance on DEF inducement. The changes aim to ...

I recently read a pretty startling statistic—in the next year, the off-highway engine market will consume about 20 million gallons of Diesel Exhaust Fluid (DEF). In the next five years that number is ...

Cummins is rolling out updated engine calibrations that give truck operators more time to address diesel exhaust fluid (DEF) ...

These two major engine manufacturers are aligning with relaxed EPA guidance related to sudden derates due to DEF/emissions ...

Paccar will roll out updated software for Kenworth and Peterbilt trucks equipped with MX-11 and MX-13 engines to reflect ...

On the heels of clarifying farmers’ right to repair their own equipment, EPA is escalating pressure on diesel engine manufacturers over ongoing Diesel Exhaust Fluid (DEF) system failures the ...

The MarketWatch News Department was not involved in the creation of this content. Washington, DC, April 21, 2026 (GLOBE NEWSWIRE) -- The Engine Technology Forum (ETF) today announced the availability ...

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 U.S. Environmental Protection Agency, working hand in hand with the U.S. Small Business Administration, is providing relief for any farmer whose tractor has suddenly shut down mid-field, or ...