Driven Racing Oil Gear Oil is being used by top race teams in every rear end differential, this unique synthetic gear oil reduces operating temperatures by up to 15°F compared to other brand gear oils. Driven Synthetic Racing Gear Oils deliver measurable performance gains in manual transmissions, rear end differentials, and power steering systems. Proven durability on short tracks and road courses. Driven Racing Oil Gear Oil has viscosity typical of 75W-110. Formerly referred to as Synthetic Gear Oil. Our synthetic gear oils and transmission fluids reduce operating temperatures by more than 15° F compared to others on the market.