2 quarts by 3200 miles - and I am devil/angel on my shoulder with how I drive my car. Sometimes cool, calm and collected, sometimes not so much. Interestingly I did the same with my first gen B58 (340) and had no oil consumption issues.
Doesn't bother me I always carry a quart in my trunk. Maybe at this point I'll never need an oil change because I'm doing it one quart at a time (that's an attempt at humor - don't take it seriously)
