Re: Losing brake fluid
its a closed system, but the pistons have to extend more and therefore retain extra fluid when pads are worn, which makes it appear like you are low on fluid (even tho you really have the same amount of fluid, its just that more of it is tied up in the braking system rather than in the master cylinder reservoir). so you can just top it off with a new bottle of fluid-never use old fluid thats been sitting more than a week-until you have time to have the pads replaced. brake fluid needs to be changed every 3 yrs regardless of mileage, so they will either replace the fluid entirely or if its still new, they will bleed the system. either way, you will have the normal amount of fluid again after they change the pads.