Having read through a lot of this I decided to get the "squirters" changed on my car. It's a 2011 CAVE car which I bought second hand. It was going from full to the bottom marker on the dipstick after between 1200 and 2500km.
It wasn't too much hassle to keep topping ti up but I decided to get the work done anyway. It cost around €900 which included a service. The garage looked up what was needed and did the breather pipes too.
That was six months ago. I was disappointed at first as I had to top up two weeks later (down by a quarter). However, since then it hasn't used any oil at all. The economy is also slightly better.
I do about 500-700km a week.
I just thought it would help to report back and to thank those who posted before.
