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.

According to the Farmer's Almanac, the winter of 2020 will be filled with bitterly cold weather from the eastern parts of the Rockies and east to the Appalachian Mountains and Northeast U.S. However, ...

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 ...

DEF: Those initials may have caught your eye at the auto parts store, dealership or even your local gas station. And if you happen to have a modern diesel car or truck, you may even have added to your ...

Diesel engines are disappearing from smaller cars and SUVs in the U.S. thanks to a series of emissions scandals since Dieselgate. But there are still plenty of heavy-duty pickups and larger trucks ...

The consequences can be dire when the diesel fuel is contaminated with DEF. In the more severe cases, the entire fuel system must be replaced, from the fuel fill pipe to the fuel injectors and ...