Ursprünglicher Beitrag von: Sara McVey ,
She will be fine. If it is synthetic oil it can sometimes last a couple thousand miles more than the average change, however make sure to replace the oil filter as well at least every couple oil changes and reset the diagnostic information right after you change the oil/filter otherwise it will still say ~20%. Keep in mind, when it says 20 % it can be anywhere between 20 and 11 % if I recall from the owner's manual. Hope this helps :) I have the same car.