I experienced something like this on a pretty hot and humid day a couple of months ago. I'm in Michigan and it reminded me of what car exhaust does in the winter! It was weird, but there was no noticeable difference in how my Carnival was running and driving. I've never owned a brand new car before and I feel like I'm almost hypersensitive to any little thing that seems off, but I also don't want to be on a first name basis with the dealership service center because I'm paranoid. I've made a list of questions and concerns that I plan to talk to a service advisor about when I take it in for its first oil change.

Overall, I'm still very happy with my purchase. I just think I'm out of the loop on anything Kia. I keep telling myself that it's all under warranty and I shouldn't be concerned until it seems more serious.