The 2011 Chrysler 300 uses Mopar Antifreeze/Coolant Type 2 HOAT in a pre-diluted 50/50 mix.
Understanding this specification helps you pick the right product whether you’re topping off or performing a full cooling-system service on models equipped with the 3.6L Pentastar or the available 5.7L Hemi. Below is a practical guide to what to buy, how to verify it on the label, and how to service the system correctly.
Coolant specification and what to buy
Before shopping, know what to look for in the bottle. The right coolant must meet Chrysler’s Type 2 HOAT specification and be premixed to 50/50. Using the wrong coolant can cause deposits, corrosion, or cooling-system problems over time.
Key features to check on the coolant product:
- Type: HOAT (Hybrid Organic Acid Technology) coolant, meeting Chrysler Type 2 HOAT specifications.
- Brand/compatibility: Mopar Antifreeze/Coolant Type 2 or a third-party coolant explicitly labeled as meeting Chrysler Type 2 HOAT requirements.
- Mixture: Premixed 50/50 coolant and distilled water—no additional mixing required.
- Compatibility caveat: Do not use Dex-Cool or other non-HOAT formulas unless the label explicitly states compatibility with Chrysler Type 2 HOAT vehicles.
- Label guidance: Choose a bottle that clearly indicates it is approved for Chrysler/Jeep/Dodge vehicles and specifically states Type 2 HOAT.
With these criteria in mind, you can confidently select the correct coolant for your 2011 Chrysler 300. If in doubt, consult a dealer or refer to the owner's manual for the exact specification.
Engine variants and compatibility
The 2011 Chrysler 300 offered multiple powertrains, including the 3.6L Pentastar V6 and, in higher trims, the 5.7L Hemi V8. Both engines use a cooling system that requires the same Type 2 HOAT coolant specification, so the same Mopar Type 2 HOAT formulation applies across these variants.
Maintenance and replacement guidelines
Preparing to replace or top off the coolant requires careful steps to avoid air pockets and ensure a proper fill. The following guidance gives a practical overview of common procedures.
To service the cooling system, follow these steps:
- Ensure the engine is completely cool before opening the radiator cap or drain valve.
- Place a drain pan under the radiator drain plug and open it to remove the old coolant.
- If you’re flushing, use distilled water and a recommended flush agent, then drain again.
- Fill with premixed 50/50 Mopar Type 2 HOAT coolant until the radiator is near full.
- Start the engine and allow it to reach operating temperature with the radiator cap off briefly to bleed air, then replace the cap and check for leaks.
After completing the procedure, check the coolant level again when the engine is cool and top off if necessary. Record the service date and note any symptoms such as overheating or coolant odors that may indicate additional issues.
What to avoid
To protect the cooling system, avoid mixing coolant types or using universal formulas that are not explicitly labeled as Chrysler Type 2 HOAT compatible. Incompatibilities can lead to deposits, reduced cooling efficiency, or seal damage over time.
Summary
For a 2011 Chrysler 300, the recommended coolant is Mopar Antifreeze/Coolant Type 2 HOAT in a premixed 50/50 solution. This specification covers the common engines of that year, including the 3.6L Pentastar and the 5.7L Hemi. When purchasing coolant, verify the label confirms Chrysler Type 2 HOAT compatibility, and avoid Dex-Cool or non-HOAT formulas unless explicitly approved. For maintenance, follow standard draining, flushing (if needed), and bleeding procedures to ensure a proper fill and long-term cooling-system health.