 Bought my wife's 2004 Endeavor new in Oct 2003 for $26k (great price!).  Has 311,000 miles now. I do 95% of maintenance and keep up with everything regularly. I change the Mobil 1 synthetic oil every 6k miles of mostly HW driving (23.5k a year).  Wish I could buy another one just like it.  The only issues were the A/C condensation leaking into the driver's side floor and the P0431 code for catalytic converter slow to warm which causes the check engine light to illuminate.  For the A'C fix, I had to remove the seats and carpet and clean everything then added the extension hose to the A/C drain under the SUV per the TSB. All is fine now and has been for many years. One set of Firestone Destination LE tires ran 100,525 miles!  I wish it didn't need premium gas. Best vehicle we ever owned.  Plan to drive another 100,000 miles or more.  We will buy a new SUV around March as a back up vehicle since we paid off our house after 18 years.