Maintaining optimal performance and ensuring compliance with emissions standards go hand in hand for operators of diesel trucks. Diesel Exhaust Fluid (DEF) is a critical component in achieving both.

Diesel engines can be more efficient than gasoline engines, but that's largely due to DEF. Here's what it does, how it helps, and what happens if you run out.

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 ...

Manufacturers' required DEF derates will soon be less severe. Current equipment may enter limp mode and slow to 5 mph, or stop altogether until a DEF fault is cleared. The EPA's new guidance for ...