Diesel exhaust fluid (DEF) is a relatively new addition to the truck and machinery world. These fluids help reduce emissions by cleaning up your vehicle's exhaust. That way, you can enjoy better performance and a cleaner ride.

Ottsen Oil Co. is a DEF distributor offering TerraCair diesel exhaust fluids. We have access to large quantities of DEF, and we can provide you with enough to keep your fleet running clean.

Speak with our Ankeny and Cedar Rapids, IA agents now to get the DEF you need for your trucks or machinery.

Why Do I Need Diesel Exhaust Fluid (DEF)?

Why Do I Need Diesel Exhaust Fluid (DEF)?

Diesel exhaust fluid is very beneficial to any diesel engine. There are a few good reasons to use it in your fleet, as well as in your own personal diesel vehicle. This fluid...

  • Is legally required for most diesel vehicles
  • Breaks down exhaust chemicals to reduce pollution
  • Improves performance and engine efficiency


Ottsen Oil is your DEF distributor in Ankeny and Cedar Rapids, IA. Place an order by calling us today. We sell DEF in cases, 55-gallon drums and 330-gallon totes.