[HPsauce]

I've been around long enough to remember when oil changes were every 3,000 miles (5,000k) and you had to add a pint (500ml) or so every few hundred miles.
The tight tolerances and minimal oil consumption of modern engines is more to do with pollution/emissions control than anything the moving parts need.
At the mileage of your car I wouldn't worry about it at all. As a bonus you're getting a "rolling" oil change so probably don't need the regular service interval changes as often.

 

[HPsauce]

I somehow doubt that burning a bit of oil will harm a petrol (T4) catalyst system on a car that's almost 10 years old. A diesel with DPF would be a different story, especially if the wrong type of oil was used.