What engine oil is best for my Fiat Linea Classic?

The best engine oil for Fiat Linea Classic Diesel variants, which comprise of the 1.3-litre Multijet Diesel engine, is 5W40 synthetic grade oil. Similarly, the best engine oil for Fiat Linea Classic Petrol variant, which comprises of the 1.4-litre FIRE petrol engine, is also 5W40 synthetic grade oil.