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, ...

The American Petroleum Institute (API) recently issued a bulletin stressing the importance of only using certified diesel exhaust fluid (DEF) for the diesel-powered vehicles that require the fluid.

Every day, technical support teams at construction equipment manufacturers and dealers get calls from customers covering any number of topics. A common engine-related call involves diesel exhaust ...

If you're short on time, here's what you should know. The primary claim made in the viral Facebook post was that Union Pacific was placing an embargo on Pilot Flying J. That supposed embargo would ...