Dodge RAM 2500 2022 Owner's Manual page 474

470 TECHNICAL SPECIFICATIONS
Fuel Selection
Diesel Exhaust Fluid
Component Fluid, Lubricant, or Genuine Part
Use good quality diesel fuel from a reputable supplier in your vehicle. Federal
law requires that you must fuel this vehicle with Ultra Low Sulfur Highway
Diesel fuel (15 ppm Sulfur maximum) and prohibits the use of Low Sulfur
Highway Diesel fuel (500 ppm Sulfur maximum) to avoid damage to the
emissions control system.
For most year-round service, Number 2 Diesel fuel meeting ASTM
specification D-975 Grade S15 will provide good performance.
If climatized or diesel Number 1 ULSD fuel is not available, and you are
operating below (20°F/-6°C), in sustained arctic conditions, Mopar®
Premium Diesel Fuel Treatment (or equivalent) is recommended to avoid
gelling.
This vehicle is fully compatible with biodiesel blends up to 5% biodiesel
meeting ASTM specification D-975. Pickup models configured with optional
B20 capability, are additionally compatible with 20% biodiesel meeting ASTM
specification D-7467.
Mopar® Diesel Exhaust Fluid (DEF) (API Certified) or equivalent that has been
API Certified to the ISO 22241 standard. Use of fluids not API Certified to ISO
22241 may result in system damage. You can receive assistance in locating
DEF in the United States by calling 866-RAM-INFO (866-726-4636). In
Canada call 1–800–465–2001 (English) or 1–800–387–9983 (French).