Jeep 2009 Grand Cherokee Owner's Manual page 461

Component
Fuel Selection (3.7L and 4.7L Engine) 87 Octane
Fuel Selection (5.7L Engine)
Fuel Selection (3.0L Diesel Engine)
Fluid, Lubricant, or Genuine Part
87 Octane Acceptable - 89 Octane Recommended
Use good quality diesel fuel from a reputable supplier in your vehicle. The
manufacturer requires that you must fuel this vehicle with Ultra Low Sul-
fur 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. If the vehicle is exposed to extreme cold (below 20F or
-7C), or is required to operate at colder-than-normal conditions for pro-
longed 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. This vehicle is fully compat-
ible with biodiesel blends up to 5% biodiesel meeting ASTM specification
D-975.
MAINTAINING YOUR VEHICLE 459
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