See Figure 1
Only genuine Honda power steering fluid or a known equivalent may be used when adding fluid. Acura says that ATF or fluids manufactured for use in other brands of vehicles by their manufacturers or independents are not compatible with the Honda power steering system. The use of any other fluid will cause the seals to swell and create leaks.
RESERVOIR LEVEL CHECK
The fluid in the power steering reservoir should be checked every few weeks for indications of leaks or low fluid level. Check the fluid with the engine cold and the vehicle parked on a level spot. The level should be between the upper and lower marks. Fluid need not be added right away unless it has dropped almost to the lower mark. DO NOT overfill the reservoir.