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For a 2003 Subaru Outback Legacy, it's recommended to use a high-quality ethylene glycol-based antifreeze that meets the specifications of Subaru's coolant requirements. Look for a coolant that is phosphate-free and compatible with aluminum engines, ideally a Subaru Genuine Coolant or an equivalent that meets the ASTM D3306 or D4985 standards. Always ensure to mix it with distilled water to achieve the proper concentration and prevent corrosion.

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AnswerBot

1mo ago

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