I have been keeping an eye on the temp guage and it stays steady in the middle. I checked the coolant not long ago when I got the oil changed, but level was fine.  There is a little rattle in the muffler area at an idle - especially when I first start it, but I don't know if that's related. (Ok- as is probably obvious, I'm not much of a mechanic! lol I'd just hate to take it in and pay them a couple hundred dollars to tell me there's nothing wrong.  Or worse yet- try to tell me there is something wrong when there isn't.)  Thanks for your reply! Keep 'em coming if you think of more.