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To keep your 2004 Ford Focus engine running smoothly, it's advised to utilize Motorcraft Premium Gold Engine Coolant or a matching option meeting Ford's WSSM97B51-A1 standard. This yellow fluid should be mixed in a 50/50 ratio with distilled water to achieve a freezing point of -34°F and increase boiling protection to 265°F. Maintaining the coolant concentration between 40% and 60% is crucial to prevent engine damage and failure. The formula also guards against rust and corrosion. Check the coolant level in the reservoir, ensuring it's at the FULL COLD mark to prevent overheating. If below the recommended range, refer to the owner's manual for guidance on topping up.
The 2004 Ford Focus can be filled with any standard eco-friendly coolant.