Normally, your body is made of about 50%-60% fluid, including water, blood, and lymphatic fluid. When your fluid levels are out of balance (too high or too low), serious health problems can happen.

Modern vehicles rely on a host of fluids to send us down the road. Some, like engine oil and coolant, are well-known, while others, like differential fluid, are less-familiar to average motorists.

It's a piece of doctorly advice you have probably heard dozens of times: "Drink plenty of fluids." But have you ever wondered what it actually means? How much is "plenty," what kinds of "fluids" are ...