2020 Ram 1500 Coolant Capacity & Type
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Quick answer
The 2020 Ram 1500 holds between 9.7 and 14.1 quarts (9.2 and 13.3 liters) of coolant, depending on the engine option. The correct coolant specification is Mopar OAT MS-12106, which is a purple-colored Organic Additive Technology coolant. It is crucial to use a 50/50 mixture of this coolant and distilled water.
- Total Cooling System Capacity: 9.7 to 14.1 quarts (9.2 to 13.3 liters)
- OEM Coolant Specification: Mopar OAT MS-12106 (Purple)
- Mix Ratio: 50/50 with distilled water
Capacity by engine option
| Engine | Capacity (quarts) | Capacity (liters) |
|---|---|---|
| 3.6L V6 | 9.7 | 9.2 |
| 5.7L V8 | 14.1 | 13.3 |
| 3.0L EcoDiesel V6 | 12.3 | 11.6 |
Flush interval
It is recommended to flush the coolant every 10 years or 150,000 miles for normal duty, or every 5 years or 75,000 miles for severe duty (such as frequent towing or off-roading).
How to refill & bleed
- Ensure the engine is cool.
- Mix the Mopar OAT MS-12106 coolant with an equal amount of distilled water.
- Slowly pour the mixture into the coolant reservoir until it reaches the "MAX" line.
- Start the engine with the heater on high and let it run for 15-20 minutes to bleed the air out of the system.
- Top off the coolant reservoir as needed.
Note: Some Ram 1500 models may have a bleeder screw on the thermostat housing to assist with air removal. Using a vacuum-fill tool is also a highly effective method to prevent air pockets.
Common cooling system issues
While the 2020 Ram 1500 is a reliable truck, some common cooling system issues have been reported, including:
- Water pump failure: This can lead to coolant leaks and overheating.
- Thermostat issues: A stuck thermostat can cause the engine to either overheat or not reach operating temperature.
- Radiator leaks: Leaks can develop in the radiator, leading to a loss of coolant.
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More specs for the 2020 Ram 1500
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2020 Ram 1500 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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