PowerStrokeNation : Ford Powerstroke Diesel Forum - View Single Post - Whats the deal with the Diesel fluid ?
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post #10 of (permalink) Old 01-16-2011, 06:59 PM
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Re: Whats the deal with the Diesel fluid ?

egr chokes the engine to a degree causing its performance to drop, the use of def alows for the egr to be turned down in a since because def is lowering emissions an allows for less egr to have to be used.

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