Same vehicle. Just started getting the low engine oil warning light around 92K miles. I suppose it's normal, although I have had multiple other vehicles that didn't need anything between oil changes upwards of 300K miles...I have a 2010 3.6R also, I change the oil every 5,000 miles as well and have to add a quart at around 3,500 miles as well. This has been true since around 80,000 and has not changed any. I don't consider it a problem. My experience is basically the same as yours.