Screaming Eagle Heavy, the regular HD fork oil is 20wt, it comes in 16oz container, check your manual, my mastiff took 10.5 oz's. I can tell you at 15K miles that it was nasty. I pulled the plugs out the bottom of the forks, even with the caps off I saw no signs of shiny above the seals. But I have a mastiff and their not out there as far as yours.