In short, modern Dodge Ram pickups use a long-life, ethylene glycol–based coolant that is formulated to meet Mopar/Chrysler specifications. The recommended product is Mopar Extended Life Coolant (ELC) or an equivalent that complies with FCA US standards. Always check your owner's manual or with a dealer for the exact specification for your engine and model year.
Understanding Ram coolant technology
Coolant requirements have evolved over Ram generations. Older Rams typically used conventional green ethylene glycol coolant, while newer models require a long-life coolant designed to resist corrosion for an extended period. Color alone is not a reliable indicator of compatibility; always verify the specification printed on the bottle and in your manual. For most current Rams, Mopar Extended Life Coolant (ELC) or an equivalent that meets FCA/Chrysler specifications is recommended. Do not mix coolant types or brands unless the product explicitly states compatibility with FCA specifications.
Below are the common options you may encounter and guidance on choosing the right one for your Ram.
- Mopar Extended Life Coolant (ELC) – the official long-life coolant designed to meet FCA/Chrysler specifications; ethylene glycol–based; typically available premixed (50/50) or as concentrate to mix with distilled water; intended for 5-year/150,000-mile service life in many climates.
- Conventional green ethylene glycol coolant (IAT) – used in older Ram models; generally not recommended for newer, extended-life service intervals unless your manual or dealer confirms compatibility.
- Other brands claiming FCA/Chrysler compatibility (HOAT/OAT formulations) – if considering a non-Mopar option, verify the label for FCA/Chrysler specification compliance and MS-number or equivalent; when in doubt, choose Mopar ELC to avoid compatibility issues.
Conclusion for this section: For most current Ram pickups, Mopar Extended Life Coolant is the safest, fully compatible choice, followed by other options that explicitly meet FCA/Chrysler specifications. Always confirm with your manual and avoid mixing coolant types.
How to service or refill your Ram cooling system
Before performing any coolant service, identify the correct specification for your model year and engine, and gather the right product and tools. The following steps outline a safe, general approach to draining, flushing, and refilling the Ram cooling system with FCA-approved coolant.
- Confirm compatibility: Check your owner’s manual or dealer guidance to ensure you use Mopar ELC or another FCA-approved coolant for your specific Ram year and engine.
- Prepare and protect: Gather Mopar ELC (premixed 50/50 or concentrate plus distilled water), drain pan, disposable gloves, distilled water if using concentrate, and any required tools. Ensure the engine is cool before starting.
- Drain old coolant: Place a drain pan under the radiator drain plug or lower hose, and carefully drain the cooling system entirely as per service manual instructions. Dispose of old coolant through a proper recycling facility.
- Flush (optional but recommended): If the system is contaminated or corroded, perform a cooling system flush following product instructions, then drain again to remove flush residue.
- Refill with FCA-approved coolant: If using premixed Mopar ELC, pour until the reservoir reaches the MAX line. If using concentrate, mix to 50/50 with distilled water and fill to the correct level.
- Bleed air and check: Reinstall the cap, start the engine with the heater on high, and allow the thermostat to open to help purge air. Refill as needed to maintain proper level once the engine returns to operating temperature and cools.
- Leak check and final levels: After the engine cools, recheck the coolant level and inspect for leaks. Replace the radiator cap if necessary and properly dispose of any waste.
Tip: If you’re unsure about the process or the correct coolant specification for your exact Ram model, have the service performed by a qualified technician to avoid potential cooling system damage.
Summary
Across Ram generations, the coolant standard has shifted from conventional green IAT to long-life ethylene glycol–based formulations designed to meet FCA/Chrysler specifications. For most modern Ram pickups, Mopar Extended Life Coolant (ELC) is the recommended option, with other FCA-approved coolants acceptable if clearly labeled for FCA/Chrysler compatibility. Always follow the vehicle’s manual, avoid mixing coolant types, and use the correct premixed or concentrate formulation. Regular maintenance and proper disposal of old coolant help keep the cooling system reliable and the engine protected.