No......1.4 16 valve 'StarJet' Engine takes Selenia Performa Synthetic 5-30w
Castrol Magnatec is semi-synthetic oil -
Mobil 1 would be a better alternative really....
I dont mean to split hairs but why do you say this? The owners manual states what is best for the petrol engines and it is SELENIA K 5w40. The slightly thicker oil grade would help maintain a better film of oil in these engines that run fairly hot.
Where do you get your info from?