How do XF's hold up under heavy mileage? Does anyone have lots of miles? Any problems as the miles add up? I have a 2007 Limited Coupe with 21K miles. My roundtrip commute to work is 100 miles per day and I am wondering how much I will want to drive my XF to work. I have the option to rotate my work commute among several other cars in my "fleet". I enjoy driving my XF coupe and my route is great for a sports car with some nice curves (rare in my part of Ohio) which can inject a little fun into the daily trip. Any comments or opinions will be appreciated. I will not drive the XF in winter in any event.