Cold Weather Operation (Below -22°F Or −30°C); After Starting; Engine Block Heater - If Equipped; Engine Break-In Recommendations - Jeep Grand Cherokee 2020 Owner's Manual

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CAUTION!
To prevent damage to the starter, do not
continuously crank the engine for more than
25 seconds at a time. Wait 60 seconds
before trying again.
Cold Weather Operation (Below –22°F Or
−30°C)
To ensure reliable starting at these
temperatures, use of an externally powered
electric engine block heater (available from
your authorized dealer) is recommended.

After Starting

The idle speed is controlled automatically, and
it will decrease as the engine warms up.
ENGINE BLOCK HEATER — IF EQUIPPED
The engine block heater warms the engine, and
permits quicker starts in cold weather. Connect
the cord to a standard 110-115 Volt AC
electrical outlet with a grounded, three-wire
extension cord.
The engine block heater must be plugged in at
least one hour to have an adequate warming
effect on the engine.
The engine block heater cord is located:
3.6L Engine — Coiled and strapped to the
engine oil dipstick tube.
5.7L Engine — Bundled and fastened to the
injector harness.
WARNING!
Remember to disconnect the engine block
heater cord before driving. Damage to the
110-115 Volt electrical cord could cause
electrocution.
ENGINE BREAK-IN RECOMMENDATIONS —

NON-SRT

A long break-in period is not required for the
drivetrain (engine, transmission, clutch, and
rear axle) 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.
STARTING AND OPERATING
While cruising, brief full-throttle acceleration
within the limits of local traffic laws contributes
to a good break-in. However, wide-open throttle
acceleration in low gear can be detrimental and
should be avoided.
The engine oil, transmission fluid, and axle
lubricant installed at the factory are high-quality
and energy-conserving. Oil, fluid, and lubricant
changes should be consistent with anticipated
climate and conditions under which vehicle
operations will occur. For the recommended
viscosity and quality grades, refer to "Fluids And
Lubricants" in "Technical Specifications".
CAUTION!
Never use Non-Detergent Oil or Straight
Mineral Oil in the engine or damage may
result.
NOTE:
A new engine may consume some oil during its
first few thousand miles (kilometers) of opera-
tion. This should be considered a normal part of
the break-in and not interpreted as an indica-
tion of difficulty. Please check your oil level with
the engine oil indicator often during the break in
period. Add oil as required.
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