This is part of FleetOwner's Fleets Explained, a Trucking 101 series to break down aspects of the trucking and fleet management industries. You can read more from the ...

The short answer to why Diesel Exhaust Fluid doesn't work in the cold: It freezes at 12 degrees Fahrenheit. Comprised primarily of deionized water and urea, DEF serves to help make large diesel ...

Long-haul truckers and diesel engine enthusiasts had to rethink their entire operations in 2010 when the Environmental Protection Agency mandated selective catalytic reduction technology. Selective ...

The Environmental Protection Agency is taking steps to address widespread concerns from farmers, truckers, and other diesel vehicle operators about a loss of speed and power, or engine derates, caused ...

Rislone DEF Crystal Clean Protects Diesel Emissions and Exhaust Systems Most drivers know the consequences of running out of fuel: The car or truck will stop running, and they'll be stranded. But what ...

HOLLY, Mich., April 16, 2025 (GLOBE NEWSWIRE) -- A diesel truck, car or SUV that is losing power and fuel economy, shutting down unexpectedly, and/or has a DEF warning light illuminated is probably ...

New guidance to engine manufacturers will reduce "derating," an automatic trigger forcing diesel engines to operate at a reduced capacity when the emissions system runs out of diesel exhaust fluid or ...

WASHINGTON – Today, at the White House Great American Agriculture Celebration, President Trump announced another decisive action U.S. Environmental Protection Agency (EPA) Administrator Lee Zeldin has ...

The EPA just released its biggest proposal yet to rewrite the 2027 heavy-duty diesel emissions rules, and it answers the question diesel owners have been asking for months. Will DEF systems disappear?