Rich, I don`t know if you already have the silicone oil, or like me you need to get. Most manufacturers do 60ml (some 50) and if 100 is too much perhaps 60 would be enough? There are differing views on viscousity but I have found the one that cropped up most was 1000cst - which is what I will go for - what did you use?
some measure it differently with different figures.
This is shock oil (suspension) for r/c cars, as you probably already know. Did you find the fan was stiff to turn by hand when cold and almost no resistance when hot, when you originally did it which is what I read,- if correct, should happen, some one will correct me if wrong, and maybe some one can shed more light on amount.
John