Hey Guys, got a 2006 Commander 3.7 with 305k and its still running pretty good. I recently gave her a tuneup after experiencing some rough idle and poor fuel economy. Its running much better after the new plugs and oil change. Here are my 2 issues. The temp gauge goes up about 1/3 of the way and the heat doesn't get hot until driving for 1/2 hour or so. The temp gauge never gets past 1/3 even after driving for a long period of time. Its freezing up he in the NE but the Jeep ran cooler than normal after flushing the cooling system and swapping out the thermostat back in the summer. I do notice the interior windows fog up when putting on the heat. My other issue is poor fuel economy. Even when I baby it I'm lucky to get 13 mpg.