You need several components to make the system work, including ... Some engines, such as Cummins, require DEF to meet certain specifications. Purchasing certified DEF is always recommended ...

Going gas means you can ditch diesel exhaust fluid (DEF) tanks and emissions equipment while enjoying diesel-like maintenance intervals—Cummins figures 15,000 miles between oil changes.

The Cummins ... system features up to 70 percent reduction in space claim and up to 30 percent reduction in weight over current aftertreatment systems. Simple and optimized Diesel Exhaust Fluid ...