The Ford Flex uses Ford Motorcraft Extended Life Coolant (ELC), a silicate-free ethylene glycol-based coolant designed for Ford engines. It is available as premixed 50/50 or as concentrate, and both options should meet Ford’s factory specification.
Coolant type and Ford specifications
Understanding the right coolant helps prevent engine overheating and corrosion. Ford specifies a long-life, silicate-free coolant that protects all cooling system metals and seals and is compatible with Ford’s maintenance intervals.
Key characteristics to look for
When shopping for coolant for your Ford Flex, ensure it matches these characteristics so it remains within factory tolerances.
- Ethylene glycol–based extended-life coolant
- Silicate-free formulation to minimize deposit formation
- Ford-approved coolant that meets the vehicle's specification (Motorcraft Extended Life Coolant)
- Available as premixed 50/50 or concentrate for manual mixing
The above features align with Ford’s recommended practice for the Flex, helping ensure optimal cooling performance and long-term reliability.
Maintenance and usage guidelines
Here are practical guidelines to choose, top up, and maintain the correct coolant in a Ford Flex.
- Use a coolant that specifically meets Ford’s specification for your vehicle (Motorcraft Extended Life Coolant). Do not use generic green or universal coolants that do not carry Ford approval.
- Choose premixed 50/50 coolant or concentrate to be mixed at a 50/50 ratio with distilled water before pouring into the system.
- Do not mix different coolant types or brands in the same system, as incompatible formulations can cause corrosion or gelling.
- Check the coolant level when the engine is cold; the reservoir should stay between the MIN and MAX marks, and top up as needed with the approved premixed coolant.
- If draining and flushing the system, follow Ford’s service procedures and dispose of used coolant responsibly.
By sticking to Ford-approved coolant and correct mixing ratios, owners can maintain effective cooling and avoid potential warranty or engine damage issues.
Where to find and how to verify
To verify, consult the owner's manual or a Ford dealership/authorized service center. The manual will list the exact Ford specification (typically a Motorcraft Extended Life Coolant) and the recommended service interval for the Flex. If you’re unsure, an automotive technician can verify the correct coolant type and perform any required flush or replacement.
Summary
Summary: The Ford Flex takes Ford Motorcraft Extended Life Coolant, a silicate-free ethylene glycol-based coolant. It is available as premixed 50/50 or concentrate. Always use coolant labeled as Ford-approved and designed to meet the factory specification. Follow service intervals and proper mixing, and consult a dealer if unsure.