What kind of engine coolant can I buy for Volvo 850?

For a Volvo 850, it's recommended to use Volvo's own coolant, which is typically a blue or green, ethylene glycol-based antifreeze. If that's not available, you can opt for a high-quality, universal coolant that meets the ASTM D3306 or D4985 standards and is phosphate-free. Always ensure that the coolant is mixed with distilled water in the appropriate ratio, usually 50:50, for optimal performance.