Quote:
Originally Posted by Diesel_Dave
DEF/SCR useage doesn't directly have anything to do with DPF regen cycles. DEF/SCR is for NOx, DPF is for smoke/particulate.
No, it's not included. The EPA test is fairly short, and DPF regens typically only happen every few hours.
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Actually I found out I was wrong. Regen fuel usage is accounted for by the EPA, at least on heavy duty diesels. The full accounting rules are complicated but there are provisions for it.