Fuel, Oil and Coolant Specifications
Inhibitor Compatability
Ethylene *Methoxy
Corrosion
Complete
Glycol
Propanol
Inhibitor
Inhibitor
Inhibitor or
Base
Base
Antifreeze Antifreeze
System
Water
Inhibitor System
Type
No
No
Chromate
Yes
No
Sodium chromate
No
No
No
Yes
Chromate
Potassium dichromate
Perry filter elements:
Yes
No
Chromate
No
Yes
5020 (type OS)
No
No
Yes
Chromate
Yes
S-453 (Spin-on)
No
Yes
@Non-chromate
Yes
Yes
5Q30 (type OS)
No
Yes
Yes
Yes
@Non-chromate
S-331 (Spin-on)
Yes
No
Yes
*Non-chromate
Yes
5070 (type OS)
Yes
No
Yes
#Non-chromate
Yes
S-473 (Spin-on)
Yes
No
Non-chromate
Lenroc filter element
Yes
Yes
Fleetguard filter elements:
Yes
Yes
No
Non-chromate
Yes
DCA (canister)
No
Yes
Non-chromate
Yes
DCA (Spin-on) (Eth. Gly)
Yes
Yes
Yes
No
Non-chromate
DCA (Spin-on) (Meth. Prop.)
No
AC filter elements:
Yes
No
Non-chromate
Yes
Yes
DCA (canister)
No
Yes
Non-chromate
Yes
Yes
DCA (Spin-on)
Luber-Finer filter elements:
No
Yes
LW-4739 (canister)
Non-chromate
Yes
Yes
No
Yes
LFW-4744 (spin-on)
Yes
non-chromate
Yes
No
Non-chromate
Yes
Yes
Yes
Nalcool 2000 (liquid)
No
Non-chromate
Yes
Yes
Yes
Perry LP-20 (liquid)
No
Yes
Yes
Non-chromate
Yes
Sy-Cool (liquid)
No
Non-chromate
Yes
Lubercool (liquid)
Yes
Yes
Dowtherm cooling sys-
Yes
Non-chromate
Yes
Yes
Yes
tem conditioner
# Perry "Universal" formula.
@Perry "Year Around" formula.
*Dowtherm 209, or equivalent.
Fig. 3 - Coolant Inhibitor Chart
High chloride coolants will have a detrimental effect
Bulk inhibitor Additives
on the water softening capabilities of systems using
Commercially packaged inhibitor systems are availa-
ion-exchange resins. Accumulations of calcium and
ble which can be added directly to the engine coolant
magnesium ions removed from the coolant and held
or to bulk storage tanks containing coolant solution.
captive by the zeolite resin can be released into the
Both chromate and non-chromate systems are
coolant by a regenerative process caused by high
available and care should be taken regarding inhibitor
chloride content solutions.
compatibility with other coolant constituents.
Non-chromate inhibitor systems are recommended for
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