Jeep Grand Cherokee 4x2 2019 Supplement Manual page 78

76 TECHNICAL SPECIFICATIONS
Component
Fuel Selection
Diesel Exhaust Fluid
NOTE: If the vehicle is exposed to extreme cold (below
20°F or -7°C), or is required to operate at colder-than-
normal conditions for prolonged periods, use climatized
No. 2 diesel fuel or dilute the No. 2 diesel fuel with 50%
No. 1 diesel fuel. This will provide better protection from
fuel gelling or wax-plugging of the fuel filters.
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, No. 2 diesel fuel meeting ASTM
specification D-975 Grade S15 will provide good performance. We
recommend you use a blend of up to 5% biodiesel, meeting ASTM
specification D-975 with your diesel engine.This vehicle is compat-
ible with biodiesel blends greater than 5% but no greater than
20% biodiesel meeting ASTM specification D-7467 provided the
shortened maintenance intervals are followed as directed.
Mopar Diesel Exhaust Fluid (API Certified) (DEF) 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.