Jeep Grand Cherokee 2018 Manual page 46

Cooling System — Drain, Flush And Refill
NOTE:
Some vehicles require special tools to add cool-
ant properly. Failure to fill these systems prop-
erly could lead to severe internal engine dam-
age. If any coolant is needed to be added to the
system please contact an authorized dealer.
If the engine coolant (antifreeze) is dirty or
contains visible sediment, have an authorized
dealer clean and flush with OAT coolant (anti-
freeze) (conforming to MS.90032).
Refer to the "Maintenance Plan" in this section
for the proper maintenance intervals.
Selection Of Coolant
Refer to "Fluids And Lubricants" in "Technical
Specifications" for further information.
NOTE:
• Mixing of engine coolant (antifreeze) other than
specified Organic Additive Technology (OAT)
engine coolant (antifreeze), may result in engine
damage and may decrease corrosion protection.
Organic Additive Technology (OAT) engine cool-
ant is different and should not be mixed with
Hybrid Organic Additive Technology (HOAT) en-
gine coolant (antifreeze) or any "globally com-
patible" coolant (antifreeze). If a non-OAT engine
coolant (antifreeze) is introduced into the cooling
system in an emergency, the cooling system will
need to be drained, flushed, and refilled with
fresh OAT coolant (conforming to MS.90032), by
an authorized dealer as soon as possible.
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• Do not use water alone or alcohol-based
engine coolant (antifreeze) products. Do not
use additional rust inhibitors or antirust prod-
ucts, as they may not be compatible with the
radiator engine coolant and may plug the
radiator.
• This vehicle has not been designed for use with
propylene glycol-based engine coolant (anti-
freeze). Use of propylene glycolbased engine
coolant (antifreeze) is not recommended.
• Some vehicles require special tools to add
coolant properly. Failure to fill these systems
properly could lead to severe internal engine
damage. If any coolant is needed to be added
to the system please contact an authorized
dealer.
Adding Coolant
Your vehicle has been built with an improved
engine coolant (OAT coolant conforming to
MS.90032) that allows extended maintenance
intervals. This engine coolant (antifreeze) can
be used up to ten years or 150,000 miles
(240,000 km) before replacement. To prevent
reducing this extended maintenance period, it is
important that you use the same engine coolant
(OAT coolant conforming to MS.90032) through-
out the life of your vehicle.
Please review these recommendations for using
Organic Additive Technology (OAT) engine cool-
ant (antifreeze) that meets the requirements of
FCA Material Standard MS.90032. When add-
ing engine coolant (antifreeze):
• We recommend using Mopar Antifreeze/
Coolant 10 Year/150,000 Mile (240,000 km)
Formula OAT (Organic Additive Technology)
that meets the requirements of FCA Material
Standard MS.90032.
• Mix a minimum solution of 50% OAT engine
coolant that meets the requirements of FCA
Material Standard MS.90032 and distilled wa-
ter. Use higher concentrations (not to exceed
70%) if temperatures below −34°F (−37°C)
are anticipated. Please contact an authorized
dealer for assistance.
• Use only high purity water such as distilled or
deionized water when mixing the water/
engine coolant (antifreeze) solution. The use
of lower quality water will reduce the amount
of corrosion protection in the engine cooling
system.
NOTE:
• It is the owner's responsibility to maintain the
proper level of protection against freezing
according to the temperatures occurring in
the area where the vehicle is operated.