The 2017 Ram 2500 uses Dex-Cool long-life coolant (orange), which is Chrysler/Mopar-approved and meets the MS-9769 specification. You can use Mopar Dex-Cool or any Dex-Cool-based coolant that explicitly lists Chrysler MS-9769 compatibility, with premixed 50/50 or concentrate-to-dilute options.
Understanding the coolant specification
Chrysler vehicles from this era rely on an organic acid technology (OAT) coolant commonly referred to as Dex-Cool. For the Ram 2500, the coolant must meet Chrysler MS-9769 and is typically orange in color. This design aims for extended service life, usually around five years or up to about 150,000 miles, depending on driving conditions. Mixing Dex-Cool with green or other non-OAT coolants can cause deposits or reduced protection, so it’s important to use only OE Dex-Cool or MS-9769-compatible formulas and keep to a 50/50 premix or properly diluted concentrate. If you’re switching from a non-Dex-Cool coolant, a complete system flush is often recommended.
Accepted coolant options
To stay compliant with the vehicle’s cooling system, choose a Dex-Cool-based coolant that explicitly documents Chrysler MS-9769 compatibility. The simplest route is the OEM Mopar Dex-Cool Type 2, which is designed for Chrysler applications. As an alternative, you can use another brand’s Dex-Cool long-life coolant as long as the label confirms MS-9769 compatibility.
- Mopar Antifreeze/Coolant Type 2 (Dex-Cool), MS-9769 certified
- Other brands’ Dex-Cool long-life coolants that explicitly list Chrysler MS-9769 compatibility on the label
When purchasing, verify the label for Dex-Cool and MS-9769 compatibility. Decide between premixed 50/50 products or concentrates that you mix with distilled water to achieve the same ratio, and avoid green or universal green/orange blends that are not MS-9769-certified.
Maintenance and service tips
If you plan to replace or top off the cooling system, follow these general steps to ensure a proper Dex-Cool fill and airflow bleeding. The Ram 2500’s Cummins diesel and heavy-duty configurations may have specific bleed procedures, so consult the owner's manual for model-specific instructions. The information below covers standard Dex-Cool service for most 2017 Rams.
- Ensure the engine is cool before starting work and place a drain pan under the radiator drain valve.
- Open the radiator drain and allow the old coolant to drain completely, then close the valve.
- Prepare a 50/50 mix of Dex-Cool (premixed or concentrate with distilled water) in the correct ratio.
- Fill the radiator with the Dex-Cool mixture and add coolant to the appropriate reservoir level.
- Start the engine with the radiator cap off (or follow the manual’s bleed procedure) to purge air until the thermostat opens and the upper hose gets hot; top off as needed.
- Allow the engine to reach operating temperature, recheck levels, look for leaks, and properly dispose of old coolant.
If you’re unsure about performing a drain-and-fill, or if you’ve previously used a different coolant, have a certified technician handle the service to avoid compatibility issues.
Summary
For a 2017 Ram 2500, the recommended coolant is Dex-Cool long-life coolant that meets Chrysler MS-9769. Use Mopar Dex-Cool Type 2 or any MS-9769-compatible Dex-Cool specifically labeled for Chrysler applications. Coolant should be used in a 50/50 premixed blend or a concentrate diluted with distilled water. Do not mix with green or other non-OAT coolants, and follow the vehicle’s service intervals and bleed procedures as outlined in the owner’s manual. When in doubt, consult a dealer or qualified technician to ensure the cooling system is correctly maintained.
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