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.

The U.S. could soon experience a severe shortage of diesel exhaust fluid (DEF), impacting U.S. drivers already hit with soaring fuel prices. DEF is a solution made up of urea and de-ionized water that ...

Diesel has had a rough go of it during the last few years, but an increasingly commonplace technology is working to change the fuel's image and make diesel vehicles viable for the future. Kyle Hyatt ...

DEF is a key component in lowering pollutants emitted from diesel engines, helping to reduce harmful emissions. Long-haul truckers and diesel engine enthusiasts had to rethink their entire operations ...

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 ...

The central truism regarding any fuel additive is that sometimes you need it—and sometimes you don’t. Aside from the untold legions of snake oil substances touted to improve fuel economy, there are ...

Most fleets would confess to using diesel fuel additives from time to time, most likely in the winter to prevent gelling. But there are fleets, lots of them it seems, that regularly treat their fuel ...

Rislone DEF Crystal Clean Protects Diesel Emissions and Exhaust Systems Most drivers know the consequences of running out of fuel: The car or truck will stop running, and they’ll be stranded. But what ...

We may receive a commission on purchases made from links. The government's strict emissions limits for combustion-powered vehicles have pushed automakers to develop technologies that let their engines ...

Steam did the heavy lifting of the Industrial Revolution. Then, at the beginning of the 20th century, diesel began to take over the load and to expand into uses that steam wouldn’t have reached, from ...

Amsoil's diesel All-in-One fuel additive combines the benefits of Amsoil Diesel Injector Clean, Diesel Cold Flow, and Diesel Cetane Boost in one package. According to the company, the additive ...

Long-haul truckers and diesel engine enthusiasts had to rethink their entire operations in 2010 when the Environmental Protection Agency mandated selective catalytic reduction technology. Selective ...