You base that on what data? I don't know if I'd go 10k miles, but 7.5k is probably perfectly reasonable and I've yet to see any troublesome analysis reports here or on BITOG that would leave me to believe otherwise.10K miles OCI in GDI engine is most def asking for trouble. Even with PP I don't go over 5K miles in MPI and 4K miles in GDI.
There is oil / gas dilution and add pack depletion to name just two.
If something can be done it doesn't always mean it should be done.