Dirty gritty drained oil when I did the oil change today

ZForce

With that kind of oil consumption… ½ qrt or more within 600 miles on the current OCI, then I would suggest:

Get your oil sample sent out with lab you have chosen to go with; dyson or blackstone.
Check the oil when the engine is cold (sat over night).
If you are indeed consuming ½ qrt within the next 600 miles.

Then:

1) Get the car to the dealer and request that an oil consumption test be started. Make sure you have them document on the service order “customer states engine is consuming excessive amounts of oil”. Be sure you are present when they take the dipstick reading and that they let the car sit on a level surface for 20 minutes before taking the reading. They may want to change the oil and they might want to (it varies between dealers) tie off the drain bolt and filler cap during the test.

2) Talk to your service mgr and let him know you will be contacting NNA to open a case on excessive oil consumption. If you got a lemon, the sooner you report it to NNA the better for a case later on depending on the Lemon Law for your state of residence. By all means treat the service mgr well and do not piss him off because it will be his call when NNA contacts him on a recommendation to replace the engine or not.

This is just a heads up, if you find yourself going down that road, hopefully not though. I have been there and done that with the bro's 06 Z33 6MT and it’s not a fun experience.