Changed the oil on my brother's Corolla two weeks ago and put in 4 qts. I assumed that's what it took. Well, he has driven around 2K already. I went to check his oil with him today and it looked a bit overfull. Turns out the '97 Corolla 1.6 only takes 3.2qts. Should I leave it be or maybe change the filter to remove 1/4qt or so? I'm not really worried about it, he has driven over 2K already, but still would like some input. What do you guys think? I should have checked the capacity beforehand, but oh well now I know.