I own a 2006 Hyundai Sonata 3.3L V6 sedan. The car currently has 81,000 miles on it and around 80,000 miles I put full synthetic Castrol Magnatec 5w-20 oil into it. From when I bought it at 60,000 miles to 80,000 miles I was only putting convential Castrol oil into it and the engine would not burn a smidge of oil between changes. Now around 81,000 miles, just 1,000 miles from my synthetic oil change, I’ve burned a little more than a quart of oil. If I switch back to conventional will the burning oil problem stop or is there now permanent damage done that needs to be checked by a mechanic?