Ram Trucks Ram 1500 (Classic), DS (USA / CAN)

Additional Notes

• The Ram 1500 Classic DS carries a DEF tank capacity of 30.3 liters across all listed configurations, a notably large reservoir relative to many light-duty diesel applications, where DEF tanks commonly range from 5 to 20 liters.
• A 30.3-liter DEF capacity is sized to extend refill intervals significantly, since DEF consumption typically runs at roughly 2–4% of diesel fuel consumption, meaning a larger tank reduces how often the fluid needs replenishing between normal service stops.
• All six rows carry a Normal use condition tied to the 30.3-liter capacity, meaning the specification applies to standard operating conditions rather than a severe-duty or first-fill scenario.
• The 3.0 V6 diesel engine uses a selective catalytic reduction system, which injects DEF into the exhaust stream to convert nitrogen oxides into nitrogen and water, a process that requires a dedicated onboard fluid reservoir of the size specified here.
• The 4x2 and 4x4 drivetrain variants of the Ram 1500 3.0 V6 D share an identical DEF capacity of 30.3 liters, indicating the drivetrain configuration has no effect on the SCR system tank sizing.
• The specifications span model year ranges of 2014-2015, 2015-2016, and 2016-2019 for both drivetrain variants, with the 30.3-liter capacity remaining constant across all three periods, reflecting no change to the DEF tank specification over the covered production span.