Getting ready to change the fork oil in my 05 RKC. I have Screamin Eagle Heavy Duty fork oil HD#99881-87 in right now. I've been looking at Amsoil Shock Therapy Medium #10. But from what I've been reading the HD oil is 20wt and the Amsoil is 10wt, is this correct? Don’t want a softer ride, already have a nice front fender tattoo from the brake line connector. Or if anyone has another suggestion.
Thanks

 

I have used the a 7 weight oil and it's much too light. I will be installing the HD type "E" fluid. I'm not sure on the weight of oil.

 

Just but bel-ray 15w in mine and fixed up that diving issue

 

I used Bel-ray 20w in mine. It's nice and stiff.

 

I did mine with ATF, Dexron II I understand it is comparable to 10w, has anti foaming additives, seal conditioners and is more stable at different temperatures.

Nice change, less dive, smooth ride.