depends on the date of printing the following spec is the revised oil spec iirc it was about 2009 they (fiat) changed their minds probably to standardize oil used across the range and reduce emissions (hence the C3 low ash certification) and look after the twin air engine on the new cars...
SAE 5W-40 ACEA C3 synthetic oil to FIAT 9.55535-S2 certification. (PETROL CARS ONLY)
as for how often..... how is the level on the dipstick? if its on minimum it needs a top up..... beware topping up the engine from empty only holds about 3l so dont go pouring loads in IIRC its about 1/2 a litre from minimum to maximum...
it should be changed along with the oil filter every year or 18,000 miles which ever comes first