A few things to be aware of
BEWARE No 1
Never rely on the dash guage to tell you when it needs oil, check your oil every week. One Abarth owner here recently didn't- result blown engine- his words "Won't do that again"
BEWARE No.2
"to my knowledge there should be a dark thin layer showing on there"
Oil in stilos (apart from diesels) is very clear looking, almost like water so it doesn't look like there's any on the dipstick and a number of stilo owners have poured more and more oil in without realising what's happening- result blown engine. Their words "Won't do that again"
BEWARE NO. 3
Some Abarths absolutely drink oil. Fiat acceptable limits for oil consumption are staggering so it needs very regular checking
BEWARE No. 4
Only ever put no more than 1/2 litre in at a time when topping up and give it time to drain to the bottom of the engine
Can't see oil on the dipstick? Use a kitchen towel to wipe the dipstick throughly then after you've dipped it again, use a clean corner of the towel and just run it down the stick, when you hit oil BINGO! Never rely on dash gauges otherwise "There will be blood" - real life is scarier than the movies