Question Answering from Frequently Asked Question Files

For the most part, those who build these information oases have been happy to make their work freely available to the general public. Question: Is downshifting a good way to slow down my car? They tell me I should downshift when braking to slow my car down. Is this really a good idea? It used to be a very good idea, back in the days of medi... How often should I replace my brake fluid?