8ight shock oil weight?

Ok,
so I am running 8ight shocks (in my mp777) because I like to be difficult.
does anyone know what weight oil the rtr shocks come with?
I purchased the shocks from a parted out kit on ebay, and I know that my suspension is a little soft (buggy is heavy, again because I like to be difficult).
I was just wondering if anyone who runs the losi 8ight could inform me
A)what is the stock oil weight (so I know what is too soft)
B)what weight oil do you use in your 8ight? (Also how much does your buggy weight (with batteries).

Thanks for your help.