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Zerex Antifreeze Coolant is an ideal coolant for fleet and vehicle maintenance. It offers protection to all cooling system metals including aluminum, ensuring long-lasting performance. With its organic acid technology in an ethylene glycol base, this coolant provides 5-year/150,000-mile service life. Its silicate and phosphate-free formula is automaker-approved for use in GM and SAAAB vehicles that require OAT DEX-COOL, making it an excellent choice for various applications. Save money by using less coolant with Zerex Antifreeze Coolant 55 gal Concentrated, which provides superior performance at a great value.