I have an 05 auto with a little over 90,000, and have never needed to do anything to it.

I change the oil every 10,000 miles, put fuel in it and drive it. Consistantly get about 40 mpg with zero driving for fuel mileage. I have been debating whether to keep it for the long haul, or trade it for an 09 TDI or gasser. Wish diesel prices were where they were when I bought it!