The 2016 Ford Fiesta uses Ford-approved long-life coolant based on Organic Acid Technology (OAT), typically Motorcraft Long-Life Coolant in a 50/50 premixed formulation.
Understanding Ford's coolant standard
Ford designs its cooling system around an OAT, extended-life coolant to protect aluminum engines and prevent corrosion. Using coolant that doesn't meet Ford's specification can impair cooling performance and may affect warranties. In practice, most owners should use Motorcraft-brand coolant or another product that explicitly meets Ford's WSS-M97B44-D (or WSS-M97B44-D2) specification.
Note: Availability and labeling can vary by country, but the requirement to use Ford-approved OAT coolant remains consistent across markets. Do not mix with older green/silicate-based coolants.
Before listing options, we present the main compatible coolant options that meet Ford spec.
- Motorcraft Premium Long-Life Coolant (50/50 premixed) — Ford-approved, meets WSS-M97B44-D.
- Motorcraft Concentrate Long-Life Coolant — Ford-approved; to be mixed with distilled water to achieve 50/50 premix and meet WSS-M97B44-D.
Here are the primary options that meet Ford's spec and are commonly available in many markets:
These products are designed to provide durable corrosion protection and extend the interval between service visits when replaced according to Ford's schedule.
Maintaining and replacing coolant in a 2016 Fiesta
When topping up or replacing coolant, follow these guidelines to ensure compatibility and safety. Use only Ford-approved coolant, avoid mixing different brand formulations, and never introduce coolant into a hot engine. If in doubt, consult a dealer or a qualified mechanic.
- Check your owner’s manual or the coolant reservoir cap for the specified coolant type and dilution (some markets use premixed, others require concentrate).
- Use distilled water if you are mixing concentrates to achieve the 50/50 ratio; do not use tap water, which can introduce minerals.
- Inspect for leaks or contamination. A green, blue, or brown residue may indicate the wrong coolant or a problem in the cooling system.
- If the system needs a full flush, have a professional perform it to avoid introducing air pockets or damaging the water pump.
- Check and replace the radiator cap and thermostat as needed; ensure the system is properly vented when refilling.
Following Ford's guidance helps protect the engine and maintain cooling efficiency over time.
Important notes for owners
Always verify the correct coolant specification for your market by checking the owner's manual or contacting a Ford dealership. Do not rely on color alone to identify coolant type, as colors can vary between manufacturers. Mixing different coolants can cause incompatibilities and reduce protection.
Summary
In short, a 2016 Ford Fiesta uses Ford-approved long-life, organic acid technology coolant—usually Motorcraft Long-Life Coolant (50/50 premixed) that meets Ford's WSS-M97B44-D specification. Use only Ford-approved coolant, follow the manual, and avoid mixing with non-OAT or green silicone-based coolants. Regular maintenance according to Ford's schedule keeps the cooling system reliable.