Auto Parts Manager, I don't know how the inventory of supplies are determined, however the last three times I have tried to purchase motor oil, air/oil filters they are always out of stock and there are always empty shelves. It has become a waste of time to go there. I know that you would want to know about customer dissatisfaction and I'm sure there are a lot more people sharing my concerns. Question: How do we know If you are even getting this concern?????? Hoping you will at least look into this problem Jerry Allbright