Diesel Exhaust Fluid (DEF) is made from a mixture of technically pure urea and purified water and must be handled and stored properly to preserve its quality. This is true for drivers filling up on ...

Diesel exhaust fluid (DEF) is a critical component in achieving both optimal performance and compliance with emissions standards. To maximize the benefits of DEF, it’s essential to understand proper ...

The quality of the DEF going into your vehicle is as important as the quality of the engine oils or fuels used in your vehicles. When diesel-powered trucks sit idle for extended periods, it’s easy to ...

This story appears in the Oct. 19 print edition of Transport Topics. LAS VEGAS — As the deadline nears for implementation of the latest change in federal emission rules, truck makers and fleets are ...

Diesel engines across agriculture, trucking and construction have been sidelined by a tiny part that was supposed to keep the air cleaner. After years of complaints about failure-prone diesel exhaust ...

Adding diesel exhaust fluid to a truck isn't the big deal some thought it would be when selective catalytic reduction first came on the scene. But DEF quality can still be a big deal. Adding diesel ...

This month marks the 10th anniversary of the American Petroleum Institute’s voluntary program for certification of diesel exhaust fluid‘s quality. Essentially, the program is modeled on the API’s ...

Recently the Environmental Protection Agency (EPA) announced that diesel exhaust fluid (DEF) quality sensors are not required on trucks. The American Trucking Associations (ATA) and others have argued ...