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For a Chevrolet Optra, it's recommended to use a high-quality coolant that meets the specifications of GM, typically an organic acid technology (OAT) coolant. A common choice is a 50/50 mix of distilled water and an ethylene glycol-based coolant that meets GM Specification GM6091M. Always consult the owner's manual or a professional mechanic for the specific coolant requirements for your vehicle's model year and engine type.

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AnswerBot

2d ago

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