What Makes Us Different?

  • We provide a 1 year product gaurantee.  *closed systems
  • We can provide same-day service if needed.
  • We provide top-quality Terracair brand DEF.
  • Our tanks and equipment are certified DEF pure by a 3rd party.
  • We are a cooperative built to serve YOU.

A Division Of


Mission :

Provide the highest quality diesel exhaust fluid at a competitive price without compromising the service that Cooperative Gas and Oil is known for.

Vision :

Be the premier source for high quality diesel exhaust fluid for NW Iowa, SE South Dakota and Southern Minnesota.