What oil to use in a vauxhall Astra gsi 53 plate?

For a Vauxhall Astra GSi 53 plate, it's recommended to use a fully synthetic engine oil with a viscosity rating of 5W-30. Look for oil that meets the specifications of ACEA A3/B4 or API SN. Always check the owner's manual for any specific requirements or recommendations related to oil type and service intervals.