Author provides tips on handling and storing Diesel Exhaust Fluid in cold climates.

Diesel exhaust fluid, or DEF, is a key component in lowering pollutants emitted from diesel engines, helping to improve efficiency and reduce emissions.

For vehicles being put back into service after a prolonged period — particularly in wintertime — fleets should follow these best practices when replacing diesel exhaust fluid (DEF) and engine ...

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 Exhaust Fluid is a critical component in a diesel truck's fuel system. Here's what it does and how much you can expect a truck to use.

If you’ve had your diesel RV or tow vehicle suddenly lose power because of a DEF (diesel exhaust fluid) issue, you’re not alone. And now, the EPA is stepping in with changes that address this problem.

DEF is a fluid needed in new semi-trucks and RVs in order to operate properly and meet emissions standards.