It is NOT a Dipstick. If you twist it, it will come off. BUT do not leave it off. Will cause issues & vent-engine doesn't like it

Its a sucker hose connection. That is where you connect the hose that sucks the oil from the engine out (Used for Jaguars as they done have drain plugs-yes its true, same engine different sump!)
Not sure if the quantities have changed but assume they have? but used to be 200mL per notch. It is also true to have the level at one notch down (as this is now how we prepare every new vehicle) but 99% of vehicles now turn up full.
I wouldn't stress too much over it. It is a NEW engine wearing itself in, there is bound to be some engine oil use.
Cheers
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