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Our Product DEF


Denny Oil Company has partnered with Mansfield Oil and Yara to bring you one of the most established and field tested DEF products in the world - AIR1. When you choose Denny Oil Company as your DEF source you are getting the world's leading DEF product, AIR1, exceptional service, and superior equipment. Here are just a few of the reasons why we think you should choose AIR1 as your DEF solution:

  • AIR1 is manufactured by the largest DEF producer in the world
  • AIR1 is sold in 45 countries
  • AIR1 meets ISO 22241 standards
  • AIR1 meets API standards and is API certified
  • AIR1 is packaged to fit your needs - available in 1 gallon jugs, 2.5 gallon jugs, 55 gallon drums, 275 or 330 gallon totes, and bulk for larger applications