What oil is required for 55plate vectra sri?

For a 2005 Vauxhall Vectra SRI with a 2.0L or 2.2L engine, it is recommended to use fully synthetic oil that meets the specifications of ACEA A3/B3 or A3/B4. Common options include 5W-30 or 5W-40 viscosity oils. Always check the owner's manual for the exact oil specifications and capacity for your specific engine variant.