Mine is the same. It has had a ton of new parts, including high pressure pump, injectors, DPF, turbo to name but a few. Just like yours, it runs really well, starts perfectly, good fuel consumption, never smokes on startup or when running and has no leaks at all. At its worst, it can use 0.5 litre of oil in 200 miles, crazy.
Unfortunately, there are other threads on here and some anecdotal evidence on the internet that any time after 80-90,000 miles these engines suddenly start drinking oil. My personal theory is gummed up oil control rings allowing small amounts of oil to get into the combustion chamber and be burnt but the DPF is catching most of it, hence nothing showing out the rear. However, I think it is enough to explain the oil consumption. I think it is also why I had to change the DPF not long after I bought it.
Its not worth tearing the engine down to check this so I will drive it until either the DPF blocks again or the chain lets go….