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  1. coolant
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    Alternatives to Dealer Fluids

    I have a 2007 Yaris. It requires HOAT coolant. HOAT is a mix of both IAT and OAT coolant. IAT is Inorganic Acid Technology, and OAT is Organic...
    Post by: coolant, Aug 2, 2013 in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
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