Conventional green coolant lasts two to three years or 30,000 to 50,000 miles. Extended-life orange and red coolants last five years or 100,000 to 150,000 miles under normal operating conditions. The ...
Red coolant is designed for modern cars with aluminium engines, lasts up to five years, and should never be mixed with green coolant. Green coolant is for older vehicles, usually lasts two years, and ...
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