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

Diesel Exhaust Fluid helps reduce your vehicle's pollution, and it has to be refilled. If you only need a little at a time, ...

This is the kind of question where we'd better talk about terms before answering it. That's because AdBlue is a brand name for what folks in the United States usually call diesel exhaust fluid — aka ...

The Environmental Protection Agency (EPA) has issued new guidance regarding diesel exhaust fluid (DEF) systems in diesel engines that cause trucks and tractors to enter “limp mode” when DEF levels are ...