This Driven Racing 75W-85 synthetic gear oil provides race proven durability and dyno proven power gains from reduced friction and parasitic drag. It can be used in quick change style rear ends and drag race applications. Viscosity typcial of 75W-85. Formerly referred to as Super Speedway Gear Oil. Driven Racing synthetic gear oils and transmission fluids reduce operating temperatures by more than 15° F compared to others on the market. SuperSpeedway Gear Oil used by Joe Gibbs Racing in every Superspeedway rear-end differential and transmission gearbox.