Was it just the Castrol edge or the high mileage version of the edgeSwitching from Mobil 1 5W-20 to Castrol Edge (black bottle) 5W-20 cut oil consumption in half on my 2009 Chrysler minivan (3.8L V6). I noticed the difference instantly on the first oil change. So, you could give Castrol a try on your next oil change.
Switched to SuperTech 5W-20 a year before I sold it. Oil consumption jumped back to the same as it was with Mobil 1.