When adding fluid to the brake master cylinder, always use an approved DOT-3 brake fluid from a clean, sealed container.
Check the brake fluid level in the master cylinder reservoir at 6,000 mile or four-month intervals. Wipe clean the area around the master cylinder and the reservoir cap. Remove the reservoir cap and, if necessary, add brake fluid to maintain the fluid level 1 / 4 inch (in.) below the lowest edge of the filler opening. Replace the reservoir cap.