I just saw this...most of the series 3 3800 motors I've seen burn oil. Generally they lose between 1 and 1.5 quarts between oil changes I've noticed while working on them. Some of them are worse than that, there's one we work on that uses 1 quart of oil every 1000 miles. She's taken very good care of the car it's whole life and it's only got about 70,000 miles. I've yet to see any of them fail because of this.