Yokomo YOKYS350 - SUPER BLEND SHOCK OIL #350, Shock oil for R/C shock absorbers  [YOKYS350]

Shock oil for RC shocks

This is a silicone-based shock oil supplied under the Yokomo YOKYS350 designation and identified by the #350 viscosity marking, intended specifically for R/C shock absorbers on model cars and buggies. As an R/C-scale accessory the oil’s role is to provide predictable damping behaviour inside threaded shock bodies and cartridges, affecting both compression and rebound response without implying any real vehicle application.

In practice the oil is used as the damping medium inside each shock; changing to a heavier or lighter oil alters how quickly the shock compresses and returns. When tuning, swap viscosities one step at a time and verify changes on the track or practice area, focusing on body roll, traction transitions, and how the model reacts over repeated bumps.

Installation is standard for threaded shock cartridges: fully disassemble the shock, drain existing fluid, inspect seals and pistons for wear or contamination, then refill to the manufacturer’s recommended level before reassembling. Work in a clean area and remove air bubbles by cycling the piston slowly while topping up the oil.

Tuning notes: use the 350 grade where a medium-to-firm damping character is needed, and pair the oil choice with spring rate and preload to reach the desired balance between stability and compliance. Test with short sessions and adjust incrementally rather than making large jumps in viscosity.