What grade engine oil for a vauxhall combo 1.7 cdti 16v?

For a Vauxhall Combo 1.7 CDTi 16V, it is typically recommended to use 5W-30 engine oil that meets the specifications of ACEA C3 or similar. This oil provides good performance in various temperatures and helps with fuel efficiency. Always check the owner's manual for specific recommendations and any updates.