DEF is a key component in lowering pollutants emitted from diesel engines, helping to reduce harmful emissions.

The modern world relies on diesel fuel for everything from personal transportation and hauling products and goods across the country to powering construction equipment and farming implements. While ...

The U.S. Environmental Protection Agency is working to fix a long-standing headache for diesel truck and equipment operators: power cuts triggered by low diesel exhaust fluid levels. New rules will ...

The Environmental Protection Agency on Tuesday announced a "fix" to "protect American farmers, truckers, and other diesel equipment operators from sudden speed and power losses caused by diesel ...