What kind of coolant does a 2015 F150 3.5 EcoBoost take?
The quick answer is: Ford Dex-Cool Extended Life Engine Coolant (orange), sold under the Motorcraft brand, in a 50/50 premixed solution with distilled water or as concentrate mixed per the label. Use only Ford-approved coolant to protect the 3.5 EcoBoost cooling system.
Official Ford recommendation
Ford specifies Dex-Cool Extended Life coolant (orange) for the 2015 F-150 with the 3.5 EcoBoost. This coolant is compatible with Ford’s cooling system materials, and the system is designed to be filled with a 50/50 mix of coolant and distilled water unless the label or manual instructs otherwise. Do not mix Dex-Cool with non-Ford or incompatible coolant chemistries unless explicitly approved by Ford.
Mixing options and practical tips
Premixed vs concentrate
You can buy Dex-Cool Extended Life coolant as premixed 50/50 or as concentrate. Premixed simplifies the process and reduces the chance of an incorrect ratio, while concentrate lets you tailor the mix to climate or availability. If you use concentrate, mix it with distilled water to achieve the 50/50 ratio before filling the cooling system.
Always use distilled water (not tap water) to prevent mineral deposits that can affect cooling performance. After flushing or replacing coolant, follow the proper bleeding procedure to remove air from the system and verify there are no leaks.
Color and identification
Dex-Cool is typically orange in color. When shopping, look for Ford-approved Dex-Cool Extended Life coolant labeled for Ford engines. Using the correct chemistry helps protect the radiator, water pump, and aluminum components over time.
Maintenance and replacement intervals
Follow the maintenance schedule in the owner's manual. Dex-Cool Extended Life coolant is designed for longer service intervals than traditional green coolant, but the exact replacement interval depends on vehicle usage and climate. If you’re unsure, have the cooling system serviced by a qualified technician to ensure proper flushing and refilling with the correct Ford-approved coolant.
Summary
For a 2015 Ford F-150 with the 3.5 EcoBoost, the recommended coolant is Ford Motorcraft Dex-Cool Extended Life Engine Coolant (orange). Use it in a 50/50 premixed solution or as concentrate mixed with distilled water, and adhere to Ford’s maintenance guidelines. Sticking to Ford-approved coolant helps protect the cooling system and maintain warranty coverage.
