I had the same issue with mine two years ago mine was under warranty. I had to pay for the oil change then you bring it back to them to check it in 400 miles or something like that. luckily mine didnt make it 100 miles and mine was almost drained, under warranty they replace my pistons, rings, and cylinder head gasket in my engine and gave it back. After they fixed it everytime i started it soundled like metal grinding and idled very rough. Even after all that i still was going through a tremendous amount of oil i brought it back and they replaced my engine and turbo under warranty, two months after my new engine and turbo my warranty was up :lol::lol:
hopefully youll get the same, sorry i wasnt helpful but sounded like my issue thought i would share.