We had the motor replaced on our 06 M/T Z at approximately 5500 miles. I've been monitoring the new engine and it appears to be burning oil too although not as bad as the original engine. We even took it back to the dealer once before my wife took a trip out of town. We just wanted them to do an "official" oil check before the car took a trip. Turns out it was 1.3 quarts low already. It's getting low again. We'll be going back to the dealership soon.