I have no idea why brake fluid is not changed more often. However, it is vital to be fresh in order for it to do its job and prevent rust from within the lines.
Remember, brake fluid is hydrPHONIC meaning that is loooooves to absorb water. Any sort of worthy shops should have brake fluid test strips to determine what condition thebrake fluid is in and how bad the contaminents are. At my previous job (Firestone complete auto care) we were required to test EVERY vehicles brake fluid with the test strip. You'd be surprised at the braking qualities between old fluid and new fluid.
If it is bad - get it change. We charged like $60-70 for a full brake flush with fluid.
Remember, brake fluid is hydrPHONIC meaning that is loooooves to absorb water. Any sort of worthy shops should have brake fluid test strips to determine what condition thebrake fluid is in and how bad the contaminents are. At my previous job (Firestone complete auto care) we were required to test EVERY vehicles brake fluid with the test strip. You'd be surprised at the braking qualities between old fluid and new fluid.
If it is bad - get it change. We charged like $60-70 for a full brake flush with fluid.
