Jeep 2008 Grand Cherokee - Manual (Page 442)

Component Fluid, Lubricant, or Genuine Part
Fuel Selection (5.7L Engines) 87 Octane Acceptable - 89 Octane Recommended
Fuel Selection (3.0L Diesel Engines) Use only the best quality fuel with a calculated Cetane Index of 42–46.
In addition, the manufacturer recommends using diesel fuel with a
sulfur content of less than or equal to 15 ppm.
Chassis
Component Fluid, Lubricant, or Genuine Part
Automatic Transmission Mopar ௡ ATF+4 Automatic Transmission Fluid
Transfer Case (NV140 Single Speed Only) Mopar ௡ ATF+4 Automatic Transmission Fluid
Transfer Case (NV245 Two Speed Only) Mopar ௡ NV 247/245 Transfer Case Lubricant
Axle Differential (Front-Rear) Mopar
௡ Synthetic Gear & Axle Lubricant SAE 75W-140 (API-GL5)
or equivalent with friction modifier additive.
Brake Master Cylinder Mopar
௡ DOT 3 Brake Fluid, SAE J1703 should be used. If DOT 3,
SAE J1703 brake fluid is not available, then DOT 4 is acceptable.
Use only recommended brake fluids.
Power Steering Reservoir This system requires the use of Mopar ௡ Hydraulic System Power
Steering Fluid (P/N 05142893AA) or equivalent, which meets
DaimlerChrysler Material Standard MS-10838.
442 MAINTAINING YOUR VEHICLE