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 ...
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 ...
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 ...
Months after telling manufacturers traditional diesel exhaust fluid (DEF) sensors are no longer mandatory for new trucks, tractors, buses, and other diesel equipment, the Environmental Protection ...
WASHINGTON — On Friday, March 27, 2026, at the White House Great American Agriculture Celebration on the South Lawn, President Trump announced U.S. Environmental Protection Agency (EPA) Administrator ...
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