2004 JEEP GRAND CHEROKEE oil viscosity

ENGINE BREAK-IN RECOMMENDATIONS
A long break-in period is not required for the engine in
your new vehicle.
Drive moderately during the first 300 miles (500 km).
After the initial 60 miles (100 km), speeds up to 50 or 55
mph (80 or 90 km/h) are desirable.
While cruising, brief full-throttle acceleration, within the
limits of local traffic laws, contributes to a good break-in.
Wide open throttle acceleration in low gear can be
detrimental and should be avoided.
The engine oil installed in the engine at the factory is a
high quality energy conserving type lubricant. Oil
changes should be consistent with anticipated climate
conditions under which vehicle operations will occur.
The recommended viscosity and quality grades are
shown in Section 7 of this manual. NON-DETERGENT
OR STRAIGHT MINERAL OILS MUST NEVER BE
USED.A new engine may consume some oil during its first few
thousand miles (kilometers) of operation. This should be
considered as a normal part of the break-in and not
interpreted as an indication of difficulty.
SAFETY TIPS
Exhaust Gas
WARNING!
Exhaust gases can injure or kill. They contain carbon
monoxide (CO) which is colorless and odorless.
Breathing it can make you unconscious and can
eventually poison you. To avoid breathing (CO)
follow the safety tips below.
²Do not inhale exhaust gases. They contain carbon
monoxide, a colorless and odorless gas which can kill.
Never run the engine in a closed area, such as a
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 51
2

7. Oil Pressure Gage
Indicates the engine oil pressure. This gage does
not measure oil level. Pressure varies with engine
speed, temperature, and oil viscosity. Normal oil pressure
will be midway between the lowest and highest limit
marks.
8. Sentry Key Indicator Light Ð If Equipped
Refer to ªSentry Key Immobilizer Systemº in
Section 2 of this manual for more information.
9. Malfunction Indicator Light
This light is part of an onboard diagnostic system
called OBD II which monitors engine and auto-
matic transmission control systems. This light
will illuminate when the ignition is in the ON position
before engine start. If the bulb does not come on when
turning the ignition key from OFF to ON, have the
condition checked promptly.Certain conditions such has a loose or missing gas cap,
poor fuel quality, etc. may illuminate the light after
engine start. The vehicle should be serviced if the light
stays on through several typical driving cycles. In most
situations, the vehicle will drive normally and will not
require towing.
When the engine is running, the ªMalfunction Indicator
Lightº may flash to alert of serious conditions that could
lead to immediate loss of power or severe catalytic
converter damage. The vehicle should be serviced as
soon as possible if this occurs.
10. Cruise Indicator Light
This indicator lights when the electronic speed
control system is turned ON.
11. Check Gages Warning Light
This light illuminates when the voltmeter, oil
pressure, or temperature gages indicate a reading
130 UNDERSTANDING YOUR INSTRUMENT PANEL

Engine Oil Selection
For best performance and maximum protection for all
engines under all types of operating conditions, the
manufacturer recommends engine oils that are API Cer-
tified and meet the requirements of DaimlerChrysler
Material Standard MS-6395.
American Petroleum Institute (API) Engine Oil
Identification Symbol
This symbol means that the oil has
been certified by the American
Petroleum Institute (API). The
manufacturer only recommends
API Certified engine oils.
Engine Oil Viscosity Chart
The proper SAE viscosity grade of engine oil should be
selected based on the following recommendation and be
within the operating temperature shown in the engine oil
viscosity chart.
4.0L Engines
MAINTAINING YOUR VEHICLE 259
7

RECOMMENDED FLUIDS, LUBRICANTS AND GENUINE PARTS
Engine
Component Fluid, Lubricant, or Genuine Part
Engine Coolant MopartAntifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hybrid Or-
ganic Additive Technology)
Engine Oil API Certified SAE 10W-30 Engine Oil is recommended for the 4.0L engine.
API Certified SAE 5W-30 Engine Oil is recommended for the 4.7L/4.7LHO
engine. Refer to oil viscosity chart for correct SAE grade meeting
DaimlerChrysler Material Standard MS-6395.
Oil Filter (All Engines) MopartOil Filter (P/N 05281090)
Spark Plugs Refer to the Vehicle Emission Control Information label in the engine com-
partment.
Fuel Selection 87 Octane (91 Octane is recommended but not required for the 4.7LHO)
292 MAINTAINING YOUR VEHICLE

Coolant Temperature Gauge.............. 131
Engine Oil Pressure Gauge............... 130
Freeing Vehicle When Stuck............... 186
Hazard Warning Flasher................. 236
Jacking............................. 242
Jump Starting......................... 246
Tow Hooks.......................... 248
Emission Control System Maintenance......254,296
Engine
Air Cleaner.......................... 264
Block Heater......................... 178
Break-In Recommendations................ 51
Compartment......................251,252
Cooling............................. 269
Exhaust Gas Caution.................... 51
Fails to Start.......................... 177
Flooded, Starting...................... 177
Fuel Requirements..................221,291
Jump Starting......................... 246Malfunction Indicator................... 130
Oil ................................ 291
Oil Change Interval.................... 258
Oil Disposal.......................... 260
Oil Filter............................ 260
Oil Filter Disposal...................... 260
Oil Pressure Gauge..................... 130
Oil Selection.......................... 291
Overheating.......................... 237
Starting............................. 176
Temperature Gauge..................... 131
Engine Oil Viscosity Chart................. 259
Entry System, Illuminated.................. 15
Exhaust Gas Caution...................... 51
Exhaust System......................... 269
Extender, Seat Belt........................ 35
Exterior Finish Care...................... 282
332 INDEX

Off-Pavement Driving.................... 285
Off-Road Driving.....................200,285
Oil, Engine
Capacity............................ 291
Change Interval....................... 258
Dipstick............................. 256
Identification Logo..................... 259
Materials Added to..................... 260
Pressure Gauge....................... 130
Recommendation...................259,291
Viscosity............................ 291
Onboard Diagnostic System..............253,254
Opener, Garage Door..................... 106
Outside Rearview Mirrors.................. 61
Overdrive..........................132,182
Overhead Console........................ 89
Overheating, Engine...................... 237
Owner's Manual........................ 324Paint Care............................. 281
Paint Damage.......................... 281
Panic Alarm............................ 21
Parking Brake.......................... 194
Passing Light........................... 79
Pedals, Adjustable........................ 84
Placard, Tire and Loading Information......... 207
Polishing and Waxing..................... 282
Power
Distribution Center..................... 288
Door Locks........................... 18
Mirrors.............................. 61
Outlet.............................. 115
Seats................................ 65
Steering............................. 266
Sunroof............................. 112
Windows............................. 24
Pregnant Women and Seat Belts.............. 34
Preparation for Jacking.................... 242
338 INDEX