Use only Honda®, or equivalent brake fluid meeting DOT 3 or DOT 4 specifications from a clean, sealed container. Using any other type of fluid may result in severe brake system damage. Avoid using any brake fluid which has been left open for several hours, or which had been initially opened more than 3 months prior to being used.
It should be obvious how important the brake system is to safe operation of your vehicle. The brake fluid is key to the proper operation of your vehicle. Low levels of fluid indicate a need for service (there may be a leak in the system or the brake pads may just be worn and in need of replacement). In any case, the brake fluid level should be inspected at least during every oil change, but more often is desirable. Every time you open the hood is a good time to glance at the master cylinder reservoir.
To check the fluid level, look on the side of the reservoir to see how high the fluid level is against the markings on the side of the reservoir. The level should be at the FULL mark. If not, remove the reservoir cap, then add the proper amount of DOT 3 or DOT 4 brake fluid to bring the level up to FULL.
See Figures 1 and 2