Not sure if it's the norm, but the car burns more oil as the mileage increases.
For the oil change at ~15K, the oil level indicator was at the half way mark. For ~30K, needed to add a quart about a week before the scheduled change. And now at 50K, just needed to add a quart with 7K remaining until the next scheduled change.
Driving habits have remained the same. Some spirited driving with the car seeing redline, but overall a ton of highway driving.