overboostedtoy is dead on. This is more than likely your piston rings. You are clearly burning oil... It's not much, but those rings will continue to deteriorate.

Any update on this, btw?

--meth

 

Talk to NAA and ask them to get the dealer to do a compression test and maybe a leakdown test. While they are doing the test, ask to look at every single spark plug they pull out. Look for spark plugs with a black crust like it was tring to burn oil in that cylinder.

Report back and then lets go from there. Good luck.