1998 Subaru Impreza Owner's Manual - Page 266

Maintenance and service "MAX" level mark "MIN" level mark HG0319 Check the fluid level on the outside of the reservoir. If the level is below "MIN", add the recommended brake fluid to "MAX". Use only brake fluid from a sealed container. J Recommended brake fluid FMVSS No. 116, fresh DOT 3 or 4 brake fluid 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. - CONTINUED - CAUTION 10-33