Jeep Grand Cherokee 2015, Operating Information Manual, Page: 377 / 878

Please review these recommendations for us-
ing Organic Additive Technology (OAT) engine
coolant (antifreeze) that meets the require-
ments of Chrysler Material Standard MS-12106.
When adding engine coolant (antifreeze):
•
We recommend using MOPAR® Antifreeze/
Coolant 10 Year/150,000 Mile Formula OAT
(Organic Additive Technology) that meets the
requirements of Chrysler Material Standard
MS-12106.
•
Mix a minimum solution of 50% OAT engine
coolant that meets the requirements of
Chrysler Material Standard MS-12106 and
distilled water. Use higher concentrations
(not to exceed 70%) if temperatures below
−34° F (−37° C) are anticipated.
•
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.
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 oper-
ated.
NOTE:
•
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 your local authorized dealer.
•
Mixing engine coolant (antifreeze) types is
not recommended and can result in cooling
system damage. If HOAT and OAT coolant
are mixed in an emergency, have a autho-
rized dealer drain, flush, and refill with OAT
coolant (conforming to MS-12106) as soon
as possible.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss
of engine coolant (antifreeze), and to ensure
that engine coolant (antifreeze) will return to the
radiator from the coolant recovery tank.
The cap should be inspected and cleaned if
there is any accumulation of foreign material on
the sealing surfaces.
WARNING!
•
Do not open hot engine cooling system.
Never add engine coolant (antifreeze)
when the engine is overheated. Do not
loosen or remove the cap to cool an over-
heated engine. Heat causes pressure to
build up in the cooling system. To prevent
scalding or injury, do not remove the pres-
sure cap while the system is hot or under
pressure.
•
Do not use a pressure cap other than the
one specified for your vehicle. Personal
injury or engine damage may result.
374