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 ...

One of the many things we love about running a diesel engine is how long it will run. You can pack in a lot of mileage without needing major repair - as long as you take care of the motor and keep ...

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

Diesel engines are known for several things. Power and torque are the biggest attractions, but there is another attribute that drivers like. They can rack up a lot of mileage without needing major ...

The Environmental Protection Agency is requiring 14 major diesel engine manufacturers to provide detailed information about diesel exhaust fluid system failures that have affected farmers and truckers ...

Diesel has had a rough go of it during the last few years, but an increasingly commonplace technology is working to change the fuel's image and make diesel vehicles viable for the future. Kyle Hyatt ...

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 ...

Diesel owners who have wrestled with warning lights, sudden power loss or even complete shutdowns tied to diesel exhaust fluid systems may finally be getting some relief. The U.S. Environmental ...

The EPA just released its biggest proposal yet to rewrite the 2027 heavy-duty diesel emissions rules, and it answers the ...

For months, diesel truck owners have wondered whether the Trump administration would dramatically roll back EPA emissions ...