| Re: 2005 CTS Oil consumption My 04 CTS 3.6 has 81000 miles on it and change the oil every 6000 miles. I am adding a quart of Mobil 1 at 3000 miles and was down a quart when I changed it recently. I know that FoMoCo claims that a quart every 1000 is considered "normal". (No Ford for me) |