114k on my 2001. One lift pump, some rear axle seals, rear driveshaft seal on transmission and now ready for a rear diff seal. Happy camper here.
Since there were a few "high mileage" injector pump failures reported (out in the 250k plus range, I think), I now regularly use fuel treatment. I believe two of the best are Stanadyne's "Performance Formula" and "Lubricity Formula". All brands claim lubricity improvements, but if you go to Stanadyne.com you'll find proof of the claim in the form of independent lab tests.
If you go to Diesel Injection Service (find on the links page), they are running a Christmas special right now that is good for about 10% off of an already good price. You can get the price of Performance Formula down to about $0. 08 per gallon treated, or Lubricity Formula down to $0. 035 per gallon treated. I plan to use the Performance Formula in colder weather, then which I use in summer will depend on whether or not I can see a fuel mileage savings that justifies the extra cost of PF over the LF.