I wouldn’t try one single product to try to prevent that oil usage, don’t waste your time or your money. If those oil control rings are stuck, and they probably are, then the piston has already moved around too much in that cylinder causing wear (and massive oil consumption). IMO.
Just drive it, add your oil and pull the spark plugs out every 5-7 thousand miles and spray them with brake clean. Reinstall. Those plugs are easy enough to remove on that engine...instead of always having to buy new plugs, why not just clean them off? Wouldn’t that take care of that issue? If not the oil consumption, which doesn’t seem to really bother you...and as most have agreed...the car can be driven that way for a long time anyway.