I've an 18 year old Bontrager Race-X-Lite front wheel (rear one went to Roadrunner IIRC), which uses a DT Swiss 240 hub.
It's been used on a variety of bikes, in all weathers and at long last needed some attention because I could detect a little play.
I popped off the end caps, which have a double seal, and removed the bearings and axle. Axle was as new with clean factory grease on it. The bearings are Japanese IKS. Popped off the seal and lo...
...clear grease and everything looked pristine.
Amazing