Because the thing that makes SCR work its magic is a consumable fluid called diesel exhaust fluid ... so it's not going to break the bank. A 2.5-gallon pack of BlueDEF (as opposed to the stuff ...

If it is an emergency, you may only be interested in 1 gallon of diesel exhaust fluid. In most instances, however, you should purchase at least 5 gallons. This is a wise strategy because diesel ...

The main benefit of a diesel SCR system ... than 900 miles per gallon of DEF. It’s not unexpected that putting a load behind the truck increased the rate of exhaust fluid use.