Silkolene Pro RSF 10wt is what's used from factory these days, to my knowledge. It is 47.36cSt, with a VI of 303.Talking about suspension.... anyone know what oil should be used when rebuilding a Fox DHX coil? Viscocity in cST please!
I'd recommend any of the other Pro RSF fluids (for fine tuning) as well, they all have high VI's and work well in shocks.
Hope that helps, excuse the serious post