Which oil does Vauxhall Astra 1.9tdi need?

The Vauxhall Astra 1.9 TDI typically requires a high-quality engine oil that meets the specifications of ACEA C3 or API SN. A commonly recommended oil type is 5W-30 fully synthetic oil, which provides optimal performance and protection for the engine. Always refer to the vehicle's owner manual for specific oil recommendations and service intervals.