The engine is been a bit noisy, especially when cold, could be pistons but I'm not sure. It has been like that since 100 000 miles / 160 000 km. It doesn't get any worse, though.
Oil changes are being made at least once a year of course, I would guess around 15 000 mi /25 000 km in-between them.
It consumes a bit of oil though, the 1.4 Petrol seems to be like that. About 0,5 liters of oil per 600 mi / 1000 km. Like this there is "always" a bit of fresh oil in the engine. If not mistaken, 0,5 / 55 is almost 1%. So it is almost like driving a two stroke Saab.
If low oil level lights up, I stop as soon as possible to add 0,5 liters that I always carry in the trunk. Usually I try to top up a bit before that happens.
I use fully synthetic 5W - 30 oil from one of the major brands.
Engine is never revved over 2500 or 3000 rpm until warm and rarely over 4000 rpm even when overtaking. Car is light and I know the roads