2000 models had "service included" in most cases up to 50,000 miles.
However, even with only 4400 on the oil it needs changing. Why? Just like any other liquid contained in metal it gets hot then cold and moisture condesates in it. You'll also find it becomes rather acidic after awhile as well.
Project Smoker, '87 603 powered wagon
Hauler, 96 CTD can you say torque?
Toy 73 Cougar xr7 convertible
Acme Automotive Inc.