Jeep 2015 Grand Cherokee - Diesel Supplement - Manual (Page 102)

Component Fluid, Lubricant, or Genuine Part
Diesel Exhaust Fluid 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.
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.
100 MAINTAINING YOUR VEHICLE