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International Automotive Technicians Network
Re: DEF consumption rate
Posted to Technical Discussion Forum on 2/14/2020 1 Reply

DEF is used in very small amounts compared to fuel. It is only used to superheat the catalyst and burn off diesel particulate in the exhaust.

More DEF is used at idle more than under regular driving conditions. This is because less heat from combustion is pr... Login to read more.

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