I'll chime in with the other posters that 1qt/8K miles
is plenty low oil consumption. Mercedes generally specs
the maximum oil consumption of its engines - gas or diesel -
at 1qt/600 miles. Granted, that's for a tired old worn
out motor, but you're more than 10 times below that.
Unless you get down to perhaps 1qt/1500 miles, the dealer,
the zone rep, and the warranty folks don't even want to
hear about it.
BTW, how do you accurately measure oil consumption at such
a low rate? I would think that at such a miniscule rate such factors as how long you wait for oil to drain to the sump and oil temperature (thermal expansion...) would add significant error.