Measure the air gap with fork compressed fully and spring and any trapped air out.
I used 10w fully synthetic oil in mind and it feels good (to me).
Also if anyone is thinking of changing oil or seals etc don't try to losen the fork caps with the top yoke bolts still nipped up as this puts pressure on the cap threads.....they will be alot easier to remove if you loosen the top yoke bolts first. (Not that I've tried to do it of course).