5 bottles in 11k miles? This is excessive. Keep track of what it is the next 6k miles...
My last 10k miles, I didn't have to refill, I burned about 1/4 bottle of oil, so I didn't refill as I was due for an oil change. The 10k miles before that, I burned 1 bottle of oil in 9 months, I refilled, and it didn't drop for the remaining 3 months up to the oil change. My car averages about 10k miles a year.