RAM 1500 CLASSIC 2020 Owner's Manual page 261

Cooling System — Drain, Flush And Refill
NOTE:
Some vehicles require special tools to add coolant
(anitfreeze) properly. Failure to fill these systems
properly could lead to severe internal engine
damage. If any coolant (antifreeze) 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
(antifreeze) (conforming to MS.90032).
Refer to the "Maintenance Plan" in this chapter 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 protec-
tion. Organic Additive Technology (OAT) engine
coolant is different and should not be mixed
with Hybrid Organic Additive Technology (HOAT)
engine coolant (antifreeze) or any "globally
compatible" 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.
Do not use water alone or alcohol-based engine

coolant (antifreeze) products. Do not use addi-
tional rust inhibitors or antirust products, 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 glycol-based 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 10 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)
throughout the life of your vehicle.
SERVICING AND MAINTENANCE
Please review these recommendations for using
Organic Additive Technology (OAT) engine coolant
(antifreeze) that meets the requirements of FCA
Material Standard MS.90032. When adding
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 Stan-
dard MS.90032.
Mix a minimum solution of 50% OAT engine

coolant that meets the requirements of FCA
Material Standard MS.90032 and distilled
water. 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 corro-
sion 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.
Some vehicles require special tools to add coolant

properly. Failure to fill these systems properly
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