i dont use selenia. fiat only recommeneded it because selenia was made by fiat lubrificanti, a company owned by fiat. fiat sold this comapony a few years ago, and since then it has changed hands 3 times. selenia is in no way better than other brands, it never was, but understandably fiat would recommend using their own oil and would only allow the use of their own oil in dealerships. many fiat dealerships now use different oils because they cant get selenia very cheap from fiat any more. any good quality 10w40 semi synthetic oil will be fine. i use castrol magnatec.