The American Petroleum Institute (API) has launched a new resource page that provides crucial information on diesel exhaust fluid (DEF) quality, purchasing, and storage. The information is tailored to meet the needs of consumers and professionals in trucking, agriculture, construction and other industries that operate diesel-powered trucks and equipment that require DEF.

“The API DEF Consumer Guidance offers consumers and drivers, fleet managers, and others clear guidance to ensure optimal performance and compliance with emissions standards,” said Bill O’Ryan, senior manager-EOLCS/DEF with API. “This crucial information is designed to help expand industry knowledge and operational efficiency.” 

The resource page details the importance of using high-quality DEF and explains the characteristics of properly formulated DEF and the potential risks associated with substandard products. 

Using API-licensed DEF can ensure that it meets the high standards required by engine and vehicle manufacturers. The institute said the DEF resource page can help professionals make informed decisions that protect their valued investments and contribute to a cleaner environment.

Access to Expert DEF Recommendations

In addition to quality guidelines, practical advice on purchasing and storing DEF is offered. 

Truck drivers, farmers, construction managers and others operating diesel-powered vehicles and equipment can access expert recommendations on sourcing DEF from reputable suppliers, ensuring product integrity from purchase to application. 

Best Practices for Storing DEF

The page also outlines best practices for storing DEF, highlighting considerations such as temperature control and contamination prevention to maintain fluid efficacy. A downloadable Do’s and Don’ts Guide for DEF storage is available as a resource for consumers and shops. 

Additional information and guidance will be added, and consumers and API encouraged industry professionals to bookmark and visit the resource page regularly to stay informed about purchasing, using and storing API certified DEF.