Quick answer
Cummins CES 14603 and CES 14439: CES 14603 and CES 14439 are Cummins Engineering Standards for engine coolant. 9 products in our directory list it. Buy one that names the exact code from your manual.
Key takeaways
- 9 coolants in our data list this code.
- Match the exact code and suffix in your manual, not the colour.
- A listed code is the coolant maker's claim.
Confirm the specification in your owner’s manual before buying. Product examples are not a fitment guarantee.
On this page
What the code means
CES 14603 and CES 14439 are Cummins Engineering Standards for engine coolant. CES 14603 is the newer of the two.
In our directory, 9 products from 4 brands (Comma, Prestone, Shell, Zerex) list this code. Chemistries their makers state: Si-OAT (4), HOAT (1), IAT (1), OAT (1). Forms: Concentrate (5), Premix 50/50 (3), Premix (ready to use) (1).
For the make-by-make answer, see the heavy-duty diesel coolant guide.
Products by code
| Code | Products listing it |
|---|---|
| Cummins CES 14603 | 6 |
| Cummins CES 14439 | 4 |
Codes with a letter or number suffix are different requirements. Buy the one your manual names, not the nearest neighbour.
Coolants whose maker lists it (9)
Each row is a product whose manufacturer lists this code on its own page or datasheet (data checked 22 Oct 2026). A listed code is the maker's claim; we have not tested the products. Products with a checked Amazon listing come first.
As an Amazon Associate I earn from qualifying purchases. Commissions never change which products we list or what the data says.
How to use this list
- Find the exact code in your owner's manual, service book or equipment documentation.
- Pick a product above that lists the same code, including any letter or suffix.
- Open the product page to read the maker's exact wording ("approved", "meets" or "suitable for" are not the same).
- Do not mix chemistries. Check with the mixing checker before topping up.
Related spec codes
Detroit Diesel 7SE298 · Caterpillar EC-1 · TMC RP-329, RP-302, RP-338 and RP-364 · MAN 324 (Typ SNF, Si-OAT, NF) · MTU MTL 5048 · Deutz DQC CA-14, CB-14 and CC-14 · All coolant specs
Buying for a fleet?
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Request bulk coolant quotes →Frequently asked questions
Which coolants meet Cummins CES 14603?
In our directory, 9 products list it, including Zerex G05 Antifreeze Coolant, Zerex G40 Antifreeze Coolant, Xstream G40 Antifreeze & Coolant Concentrate. The full list is on this page.
Can I use a universal coolant instead of Cummins CES 14603?
Only if the maker of that universal coolant lists this exact code on the label or datasheet. "Compatible with all makes" is not the same as listing the code.
Where do I find the Cummins CES 14603 requirement?
In the owner's manual or service literature, usually in the fluids or capacities section, and sometimes on the reservoir cap.
How we source this page
- Facts come from manufacturer pages, datasheets, owner's manuals and standards bodies, linked under Sources.
- We do not test products, and no brand pays to be listed or ranked. Advertising and affiliate links are labelled and never change the data.
- Anything we could not find is marked "not published" rather than guessed. Spotted an error? Tell us.
Sources
- Zerex: Zerex G05 Antifreeze Coolant (manufacturer page)
- Zerex: Zerex G40 Antifreeze Coolant (manufacturer page)
- Comma: Xstream G40 Antifreeze & Coolant Concentrate (manufacturer page)
- Comma: Xstream G40 Antifreeze & Coolant Ready Mixed (manufacturer page)
- Prestone: Prestone Command ESI Precharged Antifreeze + Coolant (manufacturer page)
- Prestone: Prestone Command Nitrite Free Extended Life Antifreeze + Coolant (manufacturer page)
- Prestone: Prestone Command Nitrited Extended Life Antifreeze + Coolant (manufacturer page)
- Shell: Shell Coolant Longlife Plus Concentrate (manufacturer page)