Keep a log book of every time you add oil and the type of oil. I would even keep the lot number and brand of the oil used. This will provide very important information if you have any oil related warranty claims. BMW has standards for appropriate oil consumption for their high output engines. One quart every 2,000 miles is not unusual for them and is considered normal and not excessive.
Just provided as a reference.
I am certain some Gen II hemis were using a quart every 1,000 miles. Cold starts are hard, hence why I ordered a block heater. Any time temp is below freezing, she will get plugged in.