If you own or operate a diesel truck, you’ve probably heard about DEF (Diesel Exhaust Fluid) — a key component in reducing emissions. But many Cummins owners wonder: when did Cummins start using DEF? Here’s a clear explanation.
1. Cummins and the Introduction of DEF
Cummins began using DEF in 2010, when new EPA emissions standards required manufacturers to reduce nitrogen...
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