Changed the fork oil today. The old oil was very dark but since I don't know what brand was in there, maybe that was the normal color! It definitely was not ATF. I used a 60ml syringe/short piece of tubing to add the new oil which made it quite easy. In order to reinstall the fork bolt on the right side, I had to loosen the handlebars/rotate them a bit to allow a socket/extension to fit on the bolt. With the box end ratchet wrench I used to remove the bolts, I couldn't generate enough finger pressure to push the bolt into the threads against the spring. Pushing down with the ratchet/extension/socket, I was able to compress the spring sufficiently to allow the bolt to screw in.
The forks had been working well enough so I wondered if I was wasting my time chasing the fluid but the Castrol 10W fork oil made the forks much smoother in operation so I'm happy I did it!
