Thread: DEF Usage
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Old 11-24-2013, 01:25 PM
organized mayhem organized mayhem is offline
Dodge Ram Forum Junior Member
Join Date: Apr 2012
Location: North East, MD
Age: 40
Posts: 48
Gender: Male
Vehicle: 2013 Ram 2500
Trim Level: SLT Big Horn Mega
Color: Mineral Grey
Engine: 2011-20?? 409ci (6.7L) Cummins Turbo Diesel 350hp 800lb/ft
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organized mayhem is on a distinguished road

Cummins says roughly 1 gallon of DEF for every 50 gallons of fuel used. Tank capacity in the manual is wrong. It lists the tank size for c&c models (4500+). 5.5 gallons is what 2500/3500 tank size should be from what is being reported elsewhere. Some are also reporting that their DEF guage is not very accurate.
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