What's the right engine oil for my car?

What's the right engine oil for a 2009 Citroen C5 2.0-litre petrol? There are so many brands and so many different types of 5/30 and 5/40 oils but which is the right one?

Your oil should be 5W/40 synthetic (5 litres with filter change). As for the brand any of the major brands would suffice (Castrol, Mobil, Shell) it is a matter of choice and cost.

Answered by Alan Ross on 6 July 2019