1999 Subaru Legacy Owner's Manual - Page 354

Clutch fluid (2.5 liter MT models) WARNING Never let clutch fluid contanct your eyes because clutch fluid can be harmful to your eyes. If clutch fluid gets in your eyes, immediately flush them thoroughly with clean water. For safety, when performing this work, wearing eye protection is advisable. D Clutch fluid absorbs moisture from the air. Any absorbed moisture can cause improper clutch operation. D If the vehicle requires frequent refilling, there may be a leak. If you suspect a problem, have the vehicle checked at your SUBARU dealer. D Never use different brands of clutch fluid together. D When clutch fluid is added, be careful not to allow any dirt into the tank. Check the fluid level on the outside of the reservoir. If the level is below "MIN" level mark, add the recommended clutch fluid to "MAX" level mark. Use only clutch fluid from a sealed container. "MAX" level mark "MIN" level mark CAUTION HB0283 10-34