I had a seal start to leak on me. I know I should have addressed changing the fluid out earlier. So, I pulled the forks and took the leaking one apart and dumped the oil in a pan. It was brown and murky looking. I then went to the local dealer for seal, orings and fork fluid. I bought the Harley branded type E fluid for the Showa forks which is what I have on my FXDB. I got the seal in and already to pour the fluid in the collapsed leg and discovered it was red colored. I am guessing that Harley buys the forks from Japan with oil installed and just installs the forks on the assembly line. If that is the case, then I don't like the looks of the original oil and I should have changed it out long ago. The other thing that I discovered was the capacity. I made a stick to tell me when I was 110mm from the top, but that was almost two pints worth and I only bought two pints and I could only fill the one leg. I bought some more today to finish the project, but it seems like a lot of oil. Did Harley change fork oils in the past few years or is that oil just some japanese junky oil?