Quick answer
Mopar MS-12106 vs MS-9769 comes down to chemistry: Mopar sells its 10-Year/150,000-Mile OAT coolant as concentrate to MS-90032 and 50/50 to MS-12106, while coolant makers list MS-9769 on HOAT products. 21 products in our data list a Mopar MS code.
What to buy
Mopar 10-Year/150,000-Mile OAT Coolant 50/50 Prediluted · Premix 50/50 · lists MS-12106
One of the products whose maker lists this spec code, with a verified Amazon listing. Buy only if your owner's manual names the same code.
Check price on AmazonAll buying optionsAs an Amazon Associate I earn from qualifying purchases. Commissions never change which products we list or what the data says.
Key takeaways
- MS-90032 / MS-12106 = Mopar OAT.
- MS-9769 appears on HOAT products.
- Don't mix OAT and HOAT.
- Your manual decides.
What the code means
- The 2022 Ram 2500/3500 owner's manual specifies OAT coolant "conforming to MS.90032" and warns against mixing it with HOAT or "globally compatible" coolant. [1]
- Mopar's 2026 catalog lists 10-Year/150,000-Mile OAT coolant as concentrate to MS-90032 (68163848AB) and 50/50 to MS-12106 (68163849AB), and calls the two interchangeable. [2]
- The Mopar eStore describes 68163848AC as "OAT Concentrate. Standard MS-9769", which differs from the catalog. Coolant makers list MS-9769 on HOAT products such as Zerex G05. [3]
Which code is on my vehicle?
Read the code in your owner's manual. In our data, MS-7170 appears mostly on conventional and some universal coolants, MS-9769 on HOAT products, and MS-12106 / MS-90032 on OAT products. Never mix OAT and HOAT, per Mopar. Buying for a particular vehicle? See best coolant for Jeep, Ram & Dodge.
About to top up with a different coolant?
Check compatibility →Coolants whose maker lists it (21)
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.
Showing 15 of 21. The rest are in Find my car coolant.
As an Amazon Associate I earn from qualifying purchases. Commissions never change which products we list or what the data says.
Related spec codes
Ford WSS-M97B44-D · GM Dex-Cool (GMW 3420 / GM 6277M) · JIS K2234 (Japanese standard) · all coolant specs. Buying for a particular car? See Toyota, Honda, Nissan, Subaru, Ford.
Frequently asked questions
Can I mix MS-12106 and MS-9769 coolant?
Mopar's manual warns against mixing OAT coolant with HOAT. Coolant makers list MS-9769 on HOAT products, so treat them as different chemistries.
Is MS-90032 the same as MS-12106?
Mopar's catalog lists the concentrate to MS-90032 and the 50/50 to MS-12106 and calls them interchangeable.
New to cooling systems? Start with how a car cooling system works. Looking for a product? Search the coolant directory or match your manual's spec with Find my car coolant. See also coolant by car make and coolants by brand.
Ready to buy?
Mopar 10-Year/150,000-Mile OAT Coolant 50/50 Prediluted · Premix 50/50 · lists MS-12106. Check that your owner's manual calls for it.
Check price on AmazonAll buying optionsAs an Amazon Associate I earn from qualifying purchases. Commissions never change which products we list or what the data says.