Quart of oil every 700 miles

[StrayKatJJL]

I have followed a number of post regarding excessive oil consumption but believe I may using more then others with similar posts. This isn't a pcv issue which signifies engine repair as my next step. The vehicle has been very well maintained, and runs great. 180,000 miles now. Can someone give me a ball park cost for doing what needs to be done to eliminate this issue. Is it crazy to just keep putting a quart of oil in every 800 miles ? It doesn't smoke and so there isn't any other problem that I am aware of. Thanks John