I'm the owner of a 2007 Yaris, which I purchased in late November. About 3 days ago I noticed a smell of what I thought might be burning oil. I'm not a mechanic, but it seems to me that this shouldn't be the case when I only have just over 3000 miles on it. I was planning on changing the oil this weekend, before I noticed the smell, even though the owner's manual suggests that it be changed at 5000 miles. Has anyone else had this problem, or knows what the problem could be?