This seems to be boggling me. I've been told rings someone and valve seals by another.

Here's the deal seems like my N18 drinks oil during the summer months, and a lot less next to nothing in the cold. Right now in the passed 500 miles I think I lost about 1/4 inch on the dipstick, it's been cold in NJ lately. And I have been driving in sport mode a lot and not really babying the car. In the same 500miles in the summer i would say I loose more than 1/2 inch on the stick.

I did have the turbo replaced under warranty in October.

I still get the occasional blue smoke from traffic but not as bad as the summer.

The valve cover PCV is suspect, she has about 20k miles on her. I get a slight vacuum tug on the cap but that is normal.

Any thoughts?