Yokomo YOKYS900 Super Blend Shock Oil #900, silicone shock oil for RC shock absorbers  [YOKYS900]

Shock oil for RC dampers

The Yokomo YOKYS900 Super Blend Shock Oil #900 is a silicone-based fluid formulated for use in RC-scale shock absorbers. It serves as the damping medium inside oil-filled dampers and is intended for model suspension tuning rather than any full-size vehicle application.

As a general-purpose shock fluid, this oil assists with consistent damping response by lubricating piston movement and controlling fluid flow through the shock ports. Used in appropriate silicone-filled shocks, it contributes to steadier rebound and compression characteristics that help drivers tune handling without changing mechanical parts.

When replacing or topping up shock oil, work on a clean bench and keep contaminants out of the bottle and shocks. Drain old oil fully, inspect shock shafts and seals for wear, then refill according to the shock builder's fill level guidance to avoid excessive aeration. After reassembly, cycle the shock to remove trapped air pockets and verify consistent damping across all shocks.

Tuning advice: select shock fluids and piston combinations based on handling goals rather than expecting a single oil to solve multiple issues. Lighter fluids reduce damping and increase responsiveness, while heavier fluids raise damping to slow movement and stabilize the model; test changes incrementally and record results for repeatable setups.