Just fitted progressive fork springs any idea on the best weight fork oil

 

I've typically used 15W

 

Congratulations on doing the best and cheapest front end mod there is. I use a 50/50 mix of 10w and 15w. Works best for me.

 

15w

 

I just put a 5weight oil in to flush the forks. The oil was black
I will warm oil and drop for a good 15 weight.Thanks for your help

 

I use the stock oil in mine with my progressive springs and they are plenty firm, but not stiff.