That is excessive oil consumption - period. It is normal for a car to go through a quart between extended changes (5000 miles is what I consider an extended interval). But you should be able to, even under a severe maintenance schedule, go 3500-4000 miles without consuming more than a quart.
Personally, I think you're losing oil (odd that you haven't noticed a leak) or as another poster mentioned, you've got a PCV issue. Check with the dealer and if no joy, take it to another for a second opinion.
Personally, I think you're losing oil (odd that you haven't noticed a leak) or as another poster mentioned, you've got a PCV issue. Check with the dealer and if no joy, take it to another for a second opinion.