Do you sell or distribute API certified Diesel Exhaust Fluid?

We would love to hear from you if you sell API-certified Diesel Exhaust Fluid (DEF) at your truck stop, travel plaza, dealership, service center, convenience store or lube change outlet. Simply send an email to, and we'll get back to you with the spreadsheet you need to complete in order to be listed on There is no charge for a retail listing on

Or, if you are a distributor of API-certified Diesel Exhaust Fluid (DEF) for fleet terminals and would like to be listed in our fleet terminal directory, do not hesitate in contacting us to start the straightforward process.

Please note that due to important quality issues associated with the handling, storage and distribution of Diesel Exhaust Fluid (DEF), we only list locations stocking API-certified Diesel Exhaust Fluid (DEF) from an ISO 22241 compliant Diesel Exhaust Fluid (DEF) producer. For more information on Diesel Exhaust Fluid (DEF) quality issues please visit our information page. You can find a list of API certified Diesel Exhaust Fluid (DEF) marketers on the API website.