For anyone whos hasnt seen tehe deal, halfords are selling castrol magnitech oil for £ 17.99. Its a 4litre bottle so perfect for my stilo. Seems to be the best deal I saw.

As discussed here

https://www.fiatforum.com/leisure-lounge/285174-4l-castrol-magnatec-17-50-a.html

dam. Hehe aww well.