My first post here although I've been looking for awhile.
I have an 07 NBS with AFM with about 80,000 km and it's burning at least 2 qts between oil changes. I've been using K&N oil filters since day 1, and changing the oil when the truck tells me to. It definitely seems to burn more, the more i am in V4 mode.
Very dissapointing for a $45K truck!