Got oil?
 

What's in your forks?

https://cimg5.ibsrv.net/gimg/www.sup...e68c7a8404.jpg
In this case I think new fork oil may classify as a performance mod :)

Ran this stuff for years. LOVED it.
https://cimg2.ibsrv.net/gimg/www.sup...4bf73d4e35.jpg

Then they changed it. To..
https://cimg1.ibsrv.net/gimg/www.sup...9e75a81fbd.jpg
Yeah, not even close!
So after some numbers research, I found this to be very close to the red bottle. It's been great so far.
https://cimg0.ibsrv.net/gimg/www.sup...3f3ea96a97.jpg

Fork oil is usually changed every other or every 3rd season, depending on miles. Now that I have the Duc, that frequency will change.

https://cimg3.ibsrv.net/gimg/www.sup...ae07ed6324.jpg
That came out of Showa 52mm forks

https://www.superhawkforum.com/forum...ng-swap-27535/
https://www.superhawkforum.com/forum...p-dsc05123.jpg