Racing Performer Ultra Silicone Diff Oil #10000 for Yokomo RP-08510KA  [RP-08510KA]

Durable high-viscosity silicone for steady diff action

This Racing Performer Ultra diff oil is an RC-scale gear differential fluid formulated to support increased drivetrain demands from modern battery and motor setups. The #10000 rating supplies a dense silicone medium designed to stabilise internal damping so the differential stays consistent under sustained stress.

In use the oil moderates torque transfer across the axle, smoothing engagement during throttle and controlling slip while cornering. Heavier silicone oils like this reduce abrupt shifts in diff response, preserving traction feel across longer runs.

Service guidance: when changing differential oil, remove the old fluid fully, clean gears and the housing, inspect bearings and seals for wear, then refill to the recommended level and reassemble correctly. Allow the oil to distribute with a few moderate runs prior to extended sessions.

Tuning note: fitting a higher-number oil such as #10000 raises coupling between outputs and can limit wheel spin under load, so revise suspension and driving setup as required to maintain ideal handling.