Extra-S gear oil is what Subaru uses on all its high-performance models. According to Subaru, this fluid has the following benefits:
- High film strength minimizes wear and protects gears
- Extreme pressure additives provide additional protection for high load conditions
- High Viscosity Index for use in a wide range of temperatures
- Anti-rust and corrosion inhibiting additives enhance the ability to combat corrosion resulting from water and acids
- Anti-foam package to minimize foaming and disperse foam in the oil
- Superior oxidation resistance to ensure performance in severe operating conditions
One quart bottle.
Nomenclature note: Subaru used to sell a drivetrain fluid called “Extra S” that came only in five gallon pails. The five-gallon pails were discontinued and Subaru started offering this one-liter bottle instead. Subaru of America tells us this is the exact same fluid as the old Extra-S, which is why we advertise it with the Extra-S title.
