Jeep WRANGLER 2023 Manual page 70

68 SERVICING AND MAINTENANCE
This vehicle has not been designed for use with

propylene glycol-based engine coolant. Use of
propylene glycol-based engine coolant 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
coolant (OAT coolant conforming to MS.90032)
that allows extended maintenance intervals. This
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 to use the same coolant
(OAT coolant conforming to MS.90032) throughout
the life of your vehicle.
Please review these recommendations for using
Organic Additive Technology (OAT) coolant that
meets the requirements of the manufacturer
Material Standard MS.90032. When adding
coolant:
We recommend using Mopar® Antifreeze/

Coolant 10 Year/150,000 Mile (240,000 km)
Formula OAT that meets the requirements of the
manufacturer Material Standard MS.90032.
Mix a minimum solution of 50% OAT coolant

that meets the requirements of the manufac-
turer Material Standard MS.90032 and deion-
ized, or distilled water. Use higher
concentrations (not to exceed 70%) if
temperatures below −34°F (−37°C) are
anticipated.
CAUTION!
Use only high purity water such as deionized, or
distilled water when mixing the water/ coolant
(antifreeze) solution for the engine, battery or
high voltage electronics cooling systems.
The use of lower quality water will reduce the
amount of corrosion protection in the engine
cooling system.
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 coolant types is not recommended and

can result in cooling system damage. If HOAT
and OAT coolant are mixed in an emergency,
have an authorized dealer drain, flush, and refill
with OAT coolant (conforming to MS.90032) as
soon as possible.
Low pressure expansion bottles for power elec-

tronics and battery cooling require a special tool
for removing the cap from the expansion bottle.
For the battery coolant bottle, it is important to
not add coolant if level is low. The vehicle should
be taken to an authorized dealer for proper
servicing of the battery coolant loop if this
should occur.