Jeep 2010 Wrangler Owner's Manual page 254

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Selection Of Engine Coolant
Use only the manufacturer's recommended en-
gine coolant (antifreeze). Refer to "Fluids, Lu-
bricants, and Genuine Parts" in "Maintaining
Your Vehicle" for the correct fluid type.
CAUTION!
• Mixing of engine coolant (antifreeze) other
than the specified HOAT engine coolant
(antifreeze) may result in engine damage
and may decrease corrosion protection. If a
non-HOAT engine coolant (antifreeze) is
introduced into the cooling system in an
emergency, it should be replaced with the
specified engine coolant (antifreeze) as
soon as possible.
• Do not use water alone or alcohol-based
engine coolant (antifreeze) products. Do
not use additional rust inhibitors or antirust
products, as they may not be compatible
with the antifreeze/engine coolant (anti-
freeze) and may plug the radiator.
252
CAUTION! (Continued)
• This vehicle has not been designed for use
with Propylene Glycol based engine cool-
ant (antifreeze). Use of Propylene Glycol
base engine coolant (antifreeze) is not rec-
ommended.
Adding Engine Coolant
Your vehicle has been built with an improved
engine coolant (antifreeze) that allows ex-
tended maintenance intervals. This engine
coolant (antifreeze) can be used up to 5 Years
or 105,000 miles (168 000 km) before replace-
ment. To prevent reducing this extended main-
tenance period, it is important that you use the
same engine coolant (antifreeze) throughout
the life of your vehicle. Please review these
recommendations for using Hybrid Organic
Additive Technology (HOAT) engine coolant
(antifreeze).
When adding engine coolant (antifreeze):
• The manufacturer
MOPAR
(Continued)
Year/100,000 Mile Formula HOAT (Hybrid
Organic Additive Technology) or equivalent.
• Mix a minimum solution of 50% HOAT engine
• Use only high purity water such as distilled
Please note that 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.
NOTE:
Mixing engine coolant (antifreeze) types will
decrease the life of the engine coolant (an-
tifreeze) and will require more frequent en-
gine coolant (antifreeze) changes.
recommends using Cooling System Pressure Cap
Antifreeze/Coolant 5 The cap must be fully tightened to prevent loss
of engine coolant (antifreeze), and to ensure
coolant (antifreeze) and distilled water. Use
higher concentrations (not to exceed 70%) if
temperatures below -34°F (-37°C) are antici-
pated.
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.