Well, I'm back! That was a LONG, boring drive! I miss my nav system. There's no woman's voice to tell me how long I had before the next turn, etc... I spent over 20 hours driving and netted about 30MPG. I probably would have done a little better but I got stuck in dead stopped traffic for several hours with the AC on full.
Initial observations (since I had plenty of time):
Drives very smooth and quiet and there's little perceptable difference between driving 65 and 95 MPH. The steering does seem a little "squirly" on center though.
Takes a big push on the accelerator to get any action out of it. The opposite of the truck which requires little push to get big results. I may have to do something about this because it gives the illusion that the car has no power.
It does seem to have the power though. A standing start at full throttle, produces quite a lag and a nice puff of smoke followed by a roar of the engine and a rush of acceleration.
The engine knocks and bumbles around a little on a cold start. I don't know if this is normal or maybe it needs a couple new glow plugs or injectors.
Some other miscellaneous problems:
Oil level sensor seems to be messed up, it keeps reporting low level despite a good reading on the old, reliable dipstick. The automatic windows don't work half the time so they may need new switches. Oh, and it has no heat... Found that out because I got bored and started messing with stuff on the drive. Automatic climate control seems to work for the most part, just won't add heat to raise the temp. Maybe the heat control valve under the hood is shot...
Tom is right about the need to keep it clean... I've already washed it twice...