My car uses a quart of oil every 200 miles can I use the stop leak for oil and will it slow down consumption

That is a very high rate of consumption and would indicate a real issue. I would have it professionally inspected before wasting money on products that rarely work. Here is a link to find a shop near you that can take a look at the entire car and tell you whats going on. https://repairpal.com/repair-shops Alex