I'm considering buying a 05 Cadillac CTS w/64,000 miles. It has the 3.6L An seems to be in excellent condition. Dealer is asking $12,400. I've read that these cars consume a lot of oil and read that there seems to be issues with timing belt/chain. Any truth to this? The car is really sweet, just a little nervous buying something this old. Are these cars reliable? Can someone please advise before its gone? Thanks in advance.