Which shocks oil is finer 30,35 or 40???

Not really sure what you mean by 'finer', but the 30wt is less thick than the 40wt. The higher the weight, the thicker the oil. Thicker oil will make the shocks less prone to bottoming out, at the expense of suspenstion speed. If you plan on bashing and jumping a lot, a heavier oil would be better. Light oils will allow the shock to move faster, and is more suited to racing and conditions where you aren't jumping too high. Hope that helps.

i have 70wt oil in my shocks in my SS/MT because i jump a lot, it takes 2secs for the shocks to fully rebound

put 10w-30 motor oil in your shocks. works like a charm.

haha never heard of that i use 30wt for my rusty

im running 40's all around in my Junker GT and going to run 30's in my Sport GT. [8D]

50 wt.
Perfect for bashin'........[8D]