What oil to use in 1.6 zafira?

For a 1.6 Vauxhall Zafira, it is recommended to use a high-quality engine oil that meets the specifications of ACEA A3/B4 or API SN. Typically, a 5W-30 or 10W-40 fully synthetic oil is suitable, but you should always check the owner's manual for the exact specifications and recommendations for your specific model year. Additionally, ensure that the oil meets any manufacturer-specific requirements, such as GM's Dexos1 or similar standards.