Subaru 2003 Legacy - Manual (Page 398)

11-26
Front differential gear oil (AT vehicles)
B
Checking the oil level
Check the differential oil level monthly.
HBA010BB
Lower level
Upper level
HBB004EB
1. Park the vehicle on a level surface and stop the engine.
2. Pull out the dipstick, wipe it clean, and insert it again.
3. Pull out the dipstick again and check the oil level on it. If it is below
the lower level, add oil to bring the level up to the upper level.
B
Recommended grade and viscosity
Each oil manufacturer has its own base oils and additives. Never use
different brands together.
Oil grade: API classification GL-5