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 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 ...

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 ...

One of the many things we love about running a diesel engine is how long it will run. You can pack in a lot of mileage without needing major repair - as long as you take care of the motor and keep ...

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.

HOLLY, Mich., April 16, 2025 (GLOBE NEWSWIRE) -- A diesel truck, car or SUV that is losing power and fuel economy, shutting down unexpectedly, and/or has a DEF warning light illuminated is probably ...

The Environmental Protection Agency is changing regulations about diesel engines that could help Oklahoma farmers and truck drivers. The rules have to do with Diesel Exhaust Fluid. The EPA began ...

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 ...