This is the stock fluid used in Subaru STI models. Until now,
the Subaru OEM High Performance Gear Oil 75W90 was only available in a 5 Gallon Drum. It's superior design helps to lessen the common 3-4 shift grind in higher mileage 5 speed WRX transmissions. This fluid will work in any Subaru that requires 75w90 fluid in transmissions and differentials. Customers have reported that shifting is smoother and less prone to grinding with Subaru OEM High Performance Gear Oil 75W90. It's what Subaru uses and recommends.
Specs: Single Quart Bottle- 75w90 Weight - GL-5
5 Speed transmissions take 3.5 quarts
6 Speed transmissions take 4.1 quarts
5 Speed Rear differentials take 0.8 quarts
6 Speed Rear differentials take 1.0 quarts
For use in MANUAL transmissions only.