What oil do you use in a s reg vauxhall vectra?

For a Vauxhall Vectra S-reg (1998-2002 models), it's generally recommended to use 10W-40 or 5W-30 multi-grade engine oil, depending on the specific engine variant and climate conditions. Always check the owner's manual for the exact specifications and any manufacturer recommendations. Additionally, using a quality oil that meets the required API and ACEA standards ensures optimal engine performance and longevity.