What coolant should you use for a zafira 1.8?

For a Vauxhall Zafira 1.8, it is recommended to use a high-quality ethylene glycol-based coolant that meets the GM specification. Typically, an OAT (Organic Acid Technology) coolant, often colored orange or red, is suitable. Always check the owner's manual for specific coolant recommendations and ensure it is diluted to the correct concentration with distilled water.