Hi all, my name is Brian and I live inBenfleet in Essex. I have a 1600cc Stilo Active Sport. Today I decided to go to the main dealer to purchase some engine oil to keep in the garage for topping up purposes. The dealer, after consulting his books, sold me two litres of Selenia Performer 5w-30w. I was expecting Selenia 20K so I thought I would contact another main dealer to confirm my purchase as correct. To cut a long story short he told me that The Selenia was not compatible with my car as Fiat do not use synthetic oil in their new cars and they, the dealer, use Castrol GTX magnaflux. Can anybody throw some light on this for me please.