I just changed the oil in my daughters 2.2L ion. It took 6qts. of oil to read full on the dip stick. I looked it up in the owners manual and they say the capacity is 5qts. I looked through google and found a couple of web pages that said the 2.2L Ion needs 6qts. of oil. Is it a GM mistake printing 5qt capacity in the manual when it really needs 6? MJ