Have now bought Giulietta LT13DDV, registered 02/03/2013. It is a Sportiva MA, petrol and manual. Etna black with red upholstery. Spent some of this morning in the boot with a torch! Wife outside with a hose, while I tried to spot the leak. It is probable that the garage left the boot open in the rain as I could not find a leak. Pheww! Went to Costco to look at oil and found Castrol Edge 5w-40 with Fiat spec 9.55535-s2. 4L for £32.38. But the Castrol website refers me to two types of Giulietta for my reg (up to 13 and 13 to later) and one is refer to dealer. So now at a loss as to what to do.
I notice that Mobil1 0W-40 meets similar spec except -Z2 -N2 and -M2 at £29.98 for 5L.