Arrowmax am-210033 Silicone Diff Fluid 59ml 300000cst  [am-210033]

Silicone differential oil for RC diffs

Arrowmax am-210033 is a 59ml bottle of silicone differential fluid specified at 300000cst for use in hobby-grade RC differential units. This product is intended as a drop-in oil for scale differentials where hobbyists adjust damping to tune handling characteristics. The description here treats the item strictly as an RC-scale accessory and does not imply any real-vehicle application.

The fluid’s primary role is to change internal differential damping. Higher viscosity increases internal resistance between gear elements or ball differentials, producing a firmer diff feel and influencing cornering and traction behavior on both carpet and hard surfaces. Lower viscosity has the opposite effect by allowing freer differential action.

Installation is straightforward for users familiar with differential maintenance: drain the original fluid, clean internal components as needed, then refill to the differential manufacturer’s recommended volume and procedure. Because diff designs vary between manufacturers and models, always follow the chassis or diff kit instructions for fill amount and assembly sequence.

When tuning, change viscosity in small steps and test on a consistent surface to evaluate changes. Keep a simple log of viscosity values and handling notes to iterate toward the desired setup. Store the bottle upright and cap it tightly after use to prevent contamination and evaporation.