2015 Ford F-150 Coolant Capacity & Type

The 2015 Ford F-150 has a total cooling system capacity of 12.7 to 15.7 quarts (12 to 14.9 liters), depending on the engine.

Quick Answer

• Total Cooling System Capacity: 12.7 – 15.7 quarts (12 – 14.9 liters)
• OEM Coolant Specification: Ford Motorcraft Orange Antifreeze/Coolant (WSS-M97B44-D2 specification, OAT chemistry, orange color)
• Mix Ratio: 50/50 with distilled water (pre-mixed or concentrate)

Capacity by Engine Option

Flush Interval

• Normal Service: The initial coolant flush is recommended at 100,000 miles. Subsequent flushes are recommended every 50,000 miles.
• Severe Duty: For vehicles that see heavy towing, frequent short trips, or extreme temperatures, it's wise to shorten the interval to every 60,000 miles.

How to Refill & Bleed

Refilling the coolant on a 2015 F-150 requires careful bleeding to prevent air pockets, which can cause overheating. While a traditional fill and bleed is possible, using a vacuum-fill tool is highly recommended for these trucks to ensure a complete fill without trapped air.

1. Mix Coolant: If using concentrate, mix it 50/50 with distilled water.
2. Fill System: Slowly add the coolant mixture to the degas bottle (coolant reservoir) until it reaches the "MAX" line.
3. Bleed Air:
   • Start the engine with the heater on its highest temperature setting and the fan on low.
   • Let the engine idle for several minutes, monitoring the temperature gauge.
   • As the engine warms up and the thermostat opens, the coolant level in the degas bottle will drop. Continue to top it off, keeping the level between the "MIN" and "MAX" marks.
   • Some technicians recommend gently squeezing the upper radiator hose to help purge any stubborn air pockets.
4. Final Check: Once the engine is at full operating temperature and the coolant level has stabilized, securely install the degas bottle cap. Check the level again after the truck has cooled down completely and top off if necessary.

Common Cooling System Issues

The 2015 F-150 is generally reliable, but like any vehicle, it has a few known cooling system weak points:

• Water Pump Failure: The water pump can sometimes fail prematurely, leading to leaks or overheating. Symptoms include a whining noise from the front of the engine or visible coolant drips.
• Coolant Leaks from Hoses & Fittings: The EcoBoost engines in particular have a complex network of coolant hoses, including lines for the turbochargers. The plastic fittings and O-rings on these lines can become brittle over time, leading to slow leaks.
• Degas Bottle Cracks: The plastic coolant reservoir (degas bottle) can develop hairline cracks with age and heat cycles, causing coolant loss and introducing air into the system.

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