I possess an identical engine that has accumulated 35,000 miles. I perform my own oil changes, thus I am fully aware of the quantity utilised.
I performed an oil change a few weeks prior, and when I replenished the used oil into the vacant 5L Castrol Edge 5w30 container, it indicated less than 5L, whereas during the last oil service, I filled it to the maximum of 5.25L.
I travelled approximately 3,500 miles over a span of 10 months between oil changes, consuming around 0.5 litres. I would only have slight concerns if 1L was consumed every 1,000 miles. How can you ascertain whether the garage dispensed 5L or 5.25L? I primarily undertake brief excursions, accumulating approximately 4,000 miles over the course of a year.
It is uncertain whether the B48 engine provides an uncomplicated method to service the CCV, as it may be integrated into the entire engine cover.
Kindly be aware that this response was not endorsed by Castrol Edge 5w30... I simply prefer the gold package of Castrol Edge.