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Re: Extended Parking and DEF
Posted to HD/Fleet Forum on 4/18/2020 4 Replies

DEF is not for PM, It's to convert NOx back to Nitrogen and Water with the help of the SCR catalyst.

DEF is not a hydrocarbon, It doesn't burn. 32.5% synthesized urea and 67.5% deionized water. Login to read more.

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