Final answer:
OAT coolant contains ethylene glycol but not silicates or phosphates.
Explanation:
Organic acid technology (OAT) coolant contains ethylene glycol but does not contain silicates or phosphates. OAT coolants are designed to prevent oxidation of ethylene glycol and the formation of organic acids which can be harmful. Instead, they contain additives that buffer pH and reserve alkalinity.
Learn more about ethylene glycol and coolant additives here:
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