When I bought my 3.5SE I told the dealer I liked the convenience of places like Oil Changers for getting my oil changed. Not to mention it's cheaper. He cautioned me though, saying that, and I quote, "the young guys at the Oil change places are overtightening the aluminum parts that are on the new Alti's, which is causing damage". My more car savy friend says he seriously doubts that they made the oil caps out of aluminum. Anyone know?